Strategic bomber
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A strategic bomber is a medium- to long-range penetration
bomber A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an air ...
aircraft designed to drop large amounts of
air-to-ground weaponry Air-to-ground weaponry is aircraft ordnance used by combat aircraft to attack ground targets. The weapons include bombs, machine guns, autocannons, air-to-surface missiles, rockets, air-launched cruise missile An air-launched cruise missile ...
onto a distant target for the purposes of debilitating the enemy's capacity to wage war. Unlike
tactical bomber Tactical bombing is aerial bombing aimed at targets of immediate military value, such as combatants, military installations, or military equipment. This is in contrast to strategic bombing, or attacking enemy cities and factories to cripple fut ...
s, penetrators, fighter-bombers, and attack aircraft, which are used in
air interdiction Air interdiction (AI), also known as deep air support (DAS), is the use of preventive tactical bombing and strafing by combat aircraft against enemy targets that are not an immediate threat, to delay, disrupt or hinder later enemy engagement of ...
operations to attack enemy combatants and military equipment, strategic bombers are designed to fly into enemy territory to destroy strategic targets (e.g., infrastructure,
logistics Logistics is generally the detailed organization and implementation of a complex operation. In a general business sense, logistics manages the flow of goods between the point of origin and the point of consumption to meet the requirements of ...
,
military installations A military base is a facility directly owned and operated by or for the military or one of its branches that shelters military equipment and personnel, and facilitates training and operations. A military base always provides accommodations for ...
, factories, etc.). In addition to
strategic bombing Strategic bombing is a military strategy used in total war with the goal of defeating the enemy by destroying its morale, its economic ability to produce and transport materiel to the theatres of military operations, or both. It is a systematica ...
, strategic bombers can be used for tactical missions. There are currently only three countries that operate strategic bombers: the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...
,
Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
and China. The modern strategic bomber role appeared after strategic bombing was widely employed, and atomic bombs were first used in combat during
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
. Nuclear strike missions (i.e., delivering nuclear-armed
missile In military terminology, a missile is a guided airborne ranged weapon capable of self-propelled flight usually by a jet engine or rocket motor. Missiles are thus also called guided missiles or guided rockets (when a previously unguided rocke ...
s or bombs) can potentially be carried out by most modern fighter-bombers and strike fighters, even at intercontinental range, with the use of aerial refueling, so any nation possessing this combination of equipment and techniques theoretically has such capability. Primary delivery aircraft for a modern strategic bombing mission need not always necessarily be a
heavy bomber Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry (usually bombs) and longest range (takeoff to landing) of their era. Archetypal heavy bombers have therefore usually been among the larges ...
type, and any modern aircraft capable of nuclear strikes at long range is equally able to carry out tactical missions with
conventional weapon The terms conventional weapons or conventional arms generally refer to weapons whose ability to damage comes from kinetic, incendiary, or explosive energy and exclude weapons of mass destruction (''e.g.'' nuclear, biological, radiological and c ...
s. An example is
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...
's Mirage IV, a small strategic bomber replaced in service by the ASMP-equipped
Mirage 2000N The Dassault Mirage 2000N is a variant of the Dassault Mirage 2000, Mirage 2000 designed for nuclear strike. It formed the core of the French air-based Strategic nuclear weapon, strategic nuclear Deterrence theory, deterrent. The Mirage 2000D ...
fighter-bomber and
Rafale The Dassault Rafale (, literally meaning "gust of wind", and "burst of fire" in a more military sense) is a French twin-engine, canard delta wing, multirole fighter aircraft designed and built by Dassault Aviation. Equipped with a wide rang ...
multirole fighter.


History


First and Second World Wars

The first strategic bombing efforts took place during
World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...
(1914–18), by the
Russia Russia (, , ), or the Russian Federation, is a transcontinental country spanning Eastern Europe and Northern Asia. It is the largest country in the world, with its internationally recognised territory covering , and encompassing one-eig ...
ns with their
Sikorsky Ilya Muromets The Sikorsky ''Ilya Muromets'' (russian: Сикорский Илья Муромец) (Sikorsky S-22, S-23, S-24, S-25, S-26 and S-27) were a class of Russian pre-World War I large four-engine commercial airliners and military heavy bombers use ...
bomber (the first heavy four-engine aircraft), and by the Germans using
Zeppelin A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, pp ...
s or long-range multi-engine
Gotha Gotha () is the fifth-largest city in Thuringia, Germany, west of Erfurt and east of Eisenach with a population of 44,000. The city is the capital of the Gotha (district), district of Gotha and was also a residence of the Ernestine House of Wet ...
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engine ...
. Zeppelins reached
England England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...
on bombing raids by 1915, forcing the British to create extensive defense systems including some of the first anti-aircraft guns which were often used with searchlights to highlight the enemy machines overhead. Late in the war, American fliers under the command of Brig. Gen.
Billy Mitchell William Lendrum Mitchell (December 29, 1879 – February 19, 1936) was a United States Army officer who is regarded as the father of the United States Air Force. Mitchell served in France during World War I and, by the conflict's end, command ...
were developing multi-aircraft "mass" bombing missions behind German lines, although the
Armistice An armistice is a formal agreement of warring parties to stop fighting. It is not necessarily the end of a war, as it may constitute only a cessation of hostilities while an attempt is made to negotiate a lasting peace. It is derived from the ...
ended full realization of what was being planned. Study of strategic bombing continued in the interwar years. Many books and articles predicted a fearful prospect for any future war, paced by political fears such as those expressed by
British Prime Minister The prime minister of the United Kingdom is the head of government of the United Kingdom. The prime minister advises the sovereign on the exercise of much of the royal prerogative, chairs the Cabinet and selects its ministers. As moder ...
Stanley Baldwin who told the
House of Commons The House of Commons is the name for the elected lower house of the bicameral parliaments of the United Kingdom and Canada. In both of these countries, the Commons holds much more legislative power than the nominally upper house of parliament. T ...
early in the 1930s that "
the bomber will always get through "The bomber will always get through" was a phrase used by Stanley Baldwin in a 1932 speech "A Fear for the Future" given to the British Parliament. His speech stated that contemporary bomber aircraft had the performance necessary to conduct a s ...
" no matter what defensive systems were undertaken. It was widely believed by the late 1930s that strategic "terror" bombing of cities in any
war War is an intense armed conflict between states, governments, societies, or paramilitary groups such as mercenaries, insurgents, and militias. It is generally characterized by extreme violence, destruction, and mortality, using regular o ...
would quickly result in devastating losses and might decide a conflict in a matter of days or weeks. But theory far exceeded what most air forces could actually put into the air. Germany focused on short-range tactical bombers.
Britain Britain most often refers to: * The United Kingdom, a sovereign state in Europe comprising the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands * Great Britain, the largest island in the United King ...
's
Royal Air Force The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) an ...
began developing four-engine long-range bombers only in the late 1930s. The
U.S. Army Air Corps The United States Army Air Corps (USAAC) was the aerial warfare service component of the United States Army between 1926 and 1941. After World War I, as early aviation became an increasingly important part of modern warfare, a philosophical ri ...
( ''Army Air Forces'' as of mid-1941) was severely limited by small budgets in the late 1930s, and only barely saved the
B-17 The Boeing B-17 Flying Fortress is a four-engined heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC). Relatively fast and high-flying for a bomber of its era, the B-17 was used primarily in the European Theater ...
bomber that would soon be vital. The equally important B-24 first flew in 1939. Both aircraft would constitute the bulk of the American bomber force that made the Allied daylight bombing of
Nazi Germany Nazi Germany (lit. "National Socialist State"), ' (lit. "Nazi State") for short; also ' (lit. "National Socialist Germany") (officially known as the German Reich from 1933 until 1943, and the Greater German Reich from 1943 to 1945) was ...
possible in 1943–45. At the start of
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
, so-called "strategic" bombing was initially carried out by
medium bomber A medium bomber is a military bomber aircraft designed to operate with medium-sized bombloads over medium range distances; the name serves to distinguish this type from larger heavy bombers and smaller light bombers. Mediums generally carrie ...
aircraft An aircraft is a vehicle that is able to fly by gaining support from the air. It counters the force of gravity by using either static lift or by using the dynamic lift of an airfoil, or in a few cases the downward thrust from jet engine ...
which were typically twin-engined, armed with several defensive guns, but only possessed limited bomb-carrying capacity and range. Both
Britain Britain most often refers to: * The United Kingdom, a sovereign state in Europe comprising the island of Great Britain, the north-eastern part of the island of Ireland and many smaller islands * Great Britain, the largest island in the United King ...
and the US were developing larger two- and four-engined designs, which began to replace or supplement the smaller aircraft by 1941–42. After American entry into the war, late, in 1941, the U.S.
8th Air Force The Eighth Air Force (Air Forces Strategic) is a numbered air force (NAF) of the United States Air Force's Air Force Global Strike Command (AFGSC). It is headquartered at Barksdale Air Force Base, Louisiana. The command serves as Air Forces ...
began to develop a daylight bombing capacity using improved
B-17 The Boeing B-17 Flying Fortress is a four-engined heavy bomber developed in the 1930s for the United States Army Air Corps (USAAC). Relatively fast and high-flying for a bomber of its era, the B-17 was used primarily in the European Theater ...
and B-24 four-engine aircraft. In order to assemble the formations to carry out these bombing campaigns, assembly ships were used to quickly form defensive
combat box The combat box was a tactical formation used by heavy (strategic) bombers of the U.S. Army Air Forces during World War II. The combat box was also referred to as a "staggered formation". Its defensive purpose was in massing the firepower of the b ...
es. The
RAF The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) and ...
concentrated its efforts on night bombing. But neither force was able to develop adequate
bombsight A bombsight is a device used by military aircraft to drop bombs accurately. Bombsights, a feature of combat aircraft since World War I, were first found on purpose-designed bomber aircraft and then moved to fighter-bombers and modern tactical ...
s or tactics to allow for often-bragged "pinpoint" accuracy. The post-war U.S. Strategic Bombing Survey studies supported the overall notion of strategic bombing, but underlined many of its shortcomings as well. Attempts to create pioneering examples of "
smart bomb Smart or SMART may refer to: Arts and entertainment * ''Smart'' (Hey! Say! JUMP album), 2014 * Smart (Hotels.com), former mascot of Hotels.com * ''Smart'' (Sleeper album), 1995 debut album by Sleeper * ''SMart'', a children's television ser ...
s" resulted in the Azon ordnance, deployed in the
European Theater The European theatre of World War II was one of the two main theatres of combat during World War II. It saw heavy fighting across Europe for almost six years, starting with Germany's invasion of Poland on 1 September 1939 and ending with the ...
and CBI Theater from B-24s. Following the untimely death of the top German advocate for strategic bombing, ''General'' Walther Wever in early June 1936, the focus of Nazi Germany's
Luftwaffe The ''Luftwaffe'' () was the aerial-warfare branch of the German ''Wehrmacht'' before and during World War II. Germany's military air arms during World War I, the ''Luftstreitkräfte'' of the Imperial Army and the '' Marine-Fliegerabtei ...
bomber forces, the so-named ''
Kampfgeschwader {{wiktionary Kampfgeschwader are the German-language name for (air force) bomber units. In WW1, they were air squadrons, while in WW2, they were air wings. History First World War During World War I, ''Kampfgeschwader'' were specialized bomber ...
'' (bomber wings) became the battlefield support of the German Army as part of the general Blitzkrieg form of warfare, carried out with both medium bombers such as the Heinkel He 111, and ''
Schnellbomber A ''Schnellbomber'' (German; literally "fast bomber") is a bomber that relies upon speed to avoid enemy fighters, rather than relying on defensive armament and armor. Concept The concept developed in the 1930s when it was believed that a ver ...
s'' such as the
Junkers Ju 88 The Junkers Ju 88 is a German World War II ''Luftwaffe'' twin-engined multirole combat aircraft. Junkers Aircraft and Motor Works (JFM) designed the plane in the mid-1930s as a so-called '' Schnellbomber'' ("fast bomber") that would be too fast ...
A. ''General'' Wever's support of the
Ural bomber The Ural bomber was the initial aircraft design program/competition to develop a long-range bomber for the Luftwaffe, created and led by General Walther Wever in the early 1930s. Wever died in an air crash on June 3, 1936, and his successor Alber ...
project before WW II's start dwindled after his passing, with the only aircraft design that could closely match the Allied bomber force's own aircraft – the early November 1937-origin
Heinkel He 177 The Heinkel He 177 ''Greif'' (Griffin) was a long-range heavy bomber flown by the ''Luftwaffe'' during World War II. The introduction of the He 177 to combat operations was significantly delayed, by both problems with the development of its ...
A, deployed in its initial form in 1941–42, hampered by a RLM requirement for the He 177A to also perform medium-angle
dive bombing A dive bomber is a bomber aircraft that dives directly at its targets in order to provide greater accuracy for the bomb it drops. Diving towards the target simplifies the bomb's trajectory and allows the pilot to keep visual contact throughou ...
, not rescinded until September 1942 – unable to perform either function properly, with a powerplant selection and particular powerplant installation design features on the 30-meter wingspan ''Greif'', that led to endless problems with engine fires. The March 1942-origin, trans-Atlantic ranged ''
Amerika Bomber The ''Amerikabomber'' () project was an initiative of the German Ministry of Aviation (''Reichsluftfahrtministerium'') to obtain a long-range strategic bomber for the '' Luftwaffe'' that would be capable of striking the United States (specifica ...
'' program sought to ameliorate the lack of a seriously long-ranged bomber for the ''Luftwaffe'', but resulted with only three Messerschmitt-built and a pair of Junkers-built prototypes ever flown, and no operational "heavy bombers" for strategic use for the Third Reich, outside of the roughly one thousand examples of the He 177 that were built. By the end of the Second World War in 1945, the "heavy" bomber, epitomized by the British Avro Lancaster and American Boeing B-29 Superfortress used in the Pacific Theater, showed what could be accomplished by
area bombing In military aviation, area bombardment (or area bombing) is a type of aerial bombardment in which bombs are dropped over the general area of a target. The term "area bombing" came into prominence during World War II. Area bombing is a form of st ...
of Japan's cities and the often small and dispersed factories within them. Under Major General
Curtis LeMay Curtis Emerson LeMay (November 15, 1906 – October 1, 1990) was an American Air Force general who implemented a controversial strategic bombing campaign in the Pacific theater of World War II. He later served as Chief of Staff of the U.S. Air ...
, the U.S. 20th Air Force, based in the Mariana Islands, undertook low-level
incendiary bomb Incendiary weapons, incendiary devices, incendiary munitions, or incendiary bombs are weapons designed to start fires or destroy sensitive equipment using fire (and sometimes used as anti-personnel weaponry), that use materials such as napalm, t ...
ing missions, results of which were soon measured in the number of square miles destroyed. The
air raids on Japan Air raids conducted by Allied forces on Japan during World War II caused extensive destruction to the country's cities and killed between 241,000 and 900,000 people. During the first years of the Pacific War these attacks were limited to the ...
had withered the nation's ability to continue fighting, although the Japanese government delayed surrender, resulting in the atomic bombs dropped on Hiroshima and
Nagasaki is the capital and the largest Cities of Japan, city of Nagasaki Prefecture on the island of Kyushu in Japan. It became the sole Nanban trade, port used for trade with the Portuguese and Dutch during the 16th through 19th centuries. The Hi ...
in August 1945.


The Cold War and its aftermath

During the Cold War, the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territori ...
and
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the European mainland, continental mainland. It comprises England, Scotlan ...
on one side and the
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
on the other kept strategic bombers ready to take off on short notice as part of the deterrent strategy of
mutually assured destruction Mutual assured destruction (MAD) is a doctrine of military strategy and national security policy which posits that a full-scale use of nuclear weapons by an attacker on a nuclear-armed defender with second-strike capabilities would cause the ...
(MAD). Most strategic bombers of the two superpowers were designed to deliver
nuclear weapon A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions ( thermonuclear bomb), producing a nuclear explosion. Both bom ...
s. For a time, some squadrons of Boeing B-52 Stratofortress bombers were kept in the air around the clock,
orbit In celestial mechanics, an orbit is the curved trajectory of an object such as the trajectory of a planet around a star, or of a natural satellite around a planet, or of an artificial satellite around an object or position in space such as ...
ing some distance away from their
fail-safe In engineering, a fail-safe is a design feature or practice that in the event of a specific type of failure, inherently responds in a way that will cause minimal or no harm to other equipment, to the environment or to people. Unlike inherent safe ...
points near the Soviet border. The
British British may refer to: Peoples, culture, and language * British people, nationals or natives of the United Kingdom, British Overseas Territories, and Crown Dependencies. ** Britishness, the British identity and common culture * British English, ...
produced three different types of " V bombers" for the
Royal Air Force The Royal Air Force (RAF) is the United Kingdom's air and space force. It was formed towards the end of the First World War on 1 April 1918, becoming the first independent air force in the world, by regrouping the Royal Flying Corps (RFC) an ...
which were designed and designated to be able to deliver British-made nuclear bombs to targets in European Russia. These bombers would have been able to reach and destroy cities like Kiev or Moscow before American strategic bombers. While they were never used against the Soviet Union or its allies, two types of V bombers, the
Avro Vulcan The Avro Vulcan (later Hawker Siddeley Vulcan from July 1963) is a jet-powered, tailless, delta-wing, high-altitude, strategic bomber, which was operated by the Royal Air Force (RAF) from 1956 until 1984. Aircraft manufacturer A.V. Roe an ...
and the
Handley Page Victor The Handley Page Victor is a British jet-powered strategic bomber developed and produced by Handley Page during the Cold War. It was the third and final '' V bomber'' to be operated by the Royal Air Force (RAF), the other two being the Avr ...
were used in the Falklands War towards the end of their operational lives. The
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
produced hundreds of unlicensed, reverse-engineered copies of the American Boeing B-29 Superfortress, which the
Soviet Air Forces The Soviet Air Forces ( rus, Военно-воздушные силы, r=Voyenno-vozdushnyye sily, VVS; literally "Military Air Forces") were one of the air forces of the Soviet Union. The other was the Soviet Air Defence Forces. The Air Forces ...
called the
Tupolev Tu-4 The Tupolev Tu-4 (russian: Туполев Ту-4; NATO reporting name: Bull) is a piston-engined Soviet strategic bomber that served the Soviet Air Force from the late 1940s to mid-1960s. It was reverse-engineered from the American Boeing B-29 ...
. The Soviets later developed the jet-powered
Tupolev Tu-16 The Tupolev Tu-16 (NATO reporting name: Badger) is a twin-engined jet strategic heavy bomber used by the Soviet Union. It has been flown for almost 70 years, and the Chinese license-built Xian H-6 remains in service with the People's Liberation ...
"Badger". The People's Republic of China produced a version of
Tupolev Tu-16 The Tupolev Tu-16 (NATO reporting name: Badger) is a twin-engined jet strategic heavy bomber used by the Soviet Union. It has been flown for almost 70 years, and the Chinese license-built Xian H-6 remains in service with the People's Liberation ...
on license from the
Soviet Union The Soviet Union,. officially the Union of Soviet Socialist Republics. (USSR),. was a List of former transcontinental countries#Since 1700, transcontinental country that spanned much of Eurasia from 1922 to 1991. A flagship communist state, ...
in the 1960s which they named the
Xian H-6 The Xian H-6 () is a twin-engine jet bomber of the Chinese People's Liberation Army Air Force (PLAAF). The H-6 is a license-built version of the Soviet Tupolev Tu-16 and remains the primary bomber aircraft of the People's Republic of China. D ...
. During the 1960s
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...
produced its
Dassault Mirage IV The Dassault Mirage IV was a French supersonic strategic bomber and deep- reconnaissance aircraft. Developed by Dassault Aviation, the aircraft entered service with the French Air Force in October 1964. For many years it was a vital part of ...
nuclear-armed bomber for the French Air Force as a part of its independent nuclear strike force, the ''
Force de Frappe The ''Force de frappe'' (French language, French: "strike force"), or ''Force de dissuasion'' ("deterrent force") after 1961,Gunston, Bill. Bombers of the West. New York: Charles Scribner's and Sons; 1973. p104 is the designation of what used to ...
'', using French-made bombers and IRBMs to deliver French-made
nuclear weapon A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions ( thermonuclear bomb), producing a nuclear explosion. Both bom ...
s. Mirage IVs served until mid-1996 in the bomber role, and to 2005 as a reconnaissance aircraft. Today the French Republic has limited its strategic armaments to a squadron of four nuclear-powered ballistic missile submarines, with 16 SLBM tubes apiece. France also maintains an active force of supersonic fighter-bombers carrying stand-off nuclear
missile In military terminology, a missile is a guided airborne ranged weapon capable of self-propelled flight usually by a jet engine or rocket motor. Missiles are thus also called guided missiles or guided rockets (when a previously unguided rocke ...
s such as the ASMP, with Mach 3 speed and a range of 500 kilometers. These missiles can be delivered by the
Dassault Dassault Group (; also GIM Dassault or Groupe Industriel Marcel Dassault SAS) is a French group of companies established in 1929 with the creation of Société des Avions Marcel Bloch (now Dassault Aviation) by Marcel Dassault, and led by son Ser ...
Mirage 2000N The Dassault Mirage 2000N is a variant of the Dassault Mirage 2000, Mirage 2000 designed for nuclear strike. It formed the core of the French air-based Strategic nuclear weapon, strategic nuclear Deterrence theory, deterrent. The Mirage 2000D ...
and
Rafale The Dassault Rafale (, literally meaning "gust of wind", and "burst of fire" in a more military sense) is a French twin-engine, canard delta wing, multirole fighter aircraft designed and built by Dassault Aviation. Equipped with a wide rang ...
fighter-bombers; the Rafale is also capable of refueling others in flight using a buddy refueling pod. Newer strategic bombers such as the
Rockwell International Rockwell International was a major American manufacturing conglomerate involved in aircraft, the space industry, defense and commercial electronics, components in the automotive industry, printing presses, avionics and industrial products. R ...
B-1B Lancer The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy bomber used by the United States Air Force. It is commonly called the "Bone" (from "B-One"). It is one of three strategic bombers serving in the U.S. Air Force fleet along with ...
, the Tupolev Tu-160, and the Northrop Grumman B-2 Spirit designs incorporate various levels of stealth technology in an effort to avoid detection, especially by
radar Radar is a detection system that uses radio waves to determine the distance ('' ranging''), angle, and radial velocity of objects relative to the site. It can be used to detect aircraft, ships, spacecraft, guided missiles, motor vehicles, we ...
networks. Despite these advances earlier strategic bombers, for example the
B-52 The Boeing B-52 Stratofortress is an American long-range, subsonic, jet-powered strategic bomber. The B-52 was designed and built by Boeing, which has continued to provide support and upgrades. It has been operated by the United States Air ...
(last produced in 1962) or the Tupolev Tu-95 remain in service and can also deploy the latest air-launched cruise missiles and other " stand-off" or
precision guided weapon A precision-guided munition (PGM, smart weapon, smart munition, smart bomb) is a guided munition intended to precisely hit a specific target, to minimize collateral damage and increase lethality against intended targets. During the First Gulf ...
s such as the JASSM and the
JDAM The Joint Direct Attack Munition (JDAM) is a guidance kit that converts unguided bombs, or "dumb bombs", into all-weather precision-guided munitions. JDAM-equipped bombs are guided by an integrated inertial guidance system coupled to a Global Po ...
. The Russian Air Force's new
Tu-160 The Tupolev Tu-160 (russian: Туполев Ту-160 Белый лебедь, translit=Belyj Lebeď, translation=White Swan; NATO reporting name: Blackjack) is a supersonic, variable-sweep wing heavy strategic bomber designed by the Tupolev Desi ...
strategic bombers are expected to be delivered on a regular basis over the course of 10 to 20 years. In addition, the current
Tu-95 The Tupolev Tu-95 (russian: Туполев Ту-95; NATO reporting name: "Bear") is a large, four-engine turboprop-powered strategic bomber and missile platform. First flown in 1952, the Tu-95 entered service with the Long-Range Aviation of t ...
and Tu-160 bombers will be periodically updated, as was done during the 1990s with the Tu-22M bombers. Strategic bombers of the Cold War were primarily armed with
nuclear weapon A nuclear weapon is an explosive device that derives its destructive force from nuclear reactions, either fission (fission bomb) or a combination of fission and fusion reactions ( thermonuclear bomb), producing a nuclear explosion. Both bom ...
s. During the post-1940s
Indochina Wars The Indochina Wars ( vi, Chiến tranh Đông Dương) was a series of wars which were waged in Southeast Asia from 1946 to 1991, by communist Indochinese forces (mainly the Democratic Republic of Vietnam) against anti-communist forces (mainly Fr ...
, and also since the end of the Cold War, modern bombers originally intended for strategic use have been exclusively employed using non-nuclear,
high explosive An explosive (or explosive material) is a reactive substance that contains a great amount of potential energy that can produce an explosion if released suddenly, usually accompanied by the production of light, heat, sound, and pressure. An ...
weapons. During the
Vietnam War The Vietnam War (also known by other names) was a conflict in Vietnam, Laos, and Cambodia from 1 November 1955 to the fall of Saigon on 30 April 1975. It was the second of the Indochina Wars and was officially fought between North Vietnam a ...
, Operation Menu, Operation Freedom Deal,
Gulf War The Gulf War was a 1990–1991 armed campaign waged by a Coalition of the Gulf War, 35-country military coalition in response to the Iraqi invasion of Kuwait. Spearheaded by the United States, the coalition's efforts against Ba'athist Iraq, ...
, military action in Afghanistan, and the
2003 invasion of Iraq The 2003 invasion of Iraq was a United States-led invasion of the Republic of Iraq and the first stage of the Iraq War. The invasion phase began on 19 March 2003 (air) and 20 March 2003 (ground) and lasted just over one month, including 26 ...
, American B-52s and B-1s were mostly employed in tactical roles. During the Soviet-Afghan war in 1979–88,
Soviet Air Forces The Soviet Air Forces ( rus, Военно-воздушные силы, r=Voyenno-vozdushnyye sily, VVS; literally "Military Air Forces") were one of the air forces of the Soviet Union. The other was the Soviet Air Defence Forces. The Air Forces ...
Tu-22Ms carried out several mass air raids in various regions of
Afghanistan Afghanistan, officially the Islamic Emirate of Afghanistan,; prs, امارت اسلامی افغانستان is a landlocked country located at the crossroads of Central Asia and South Asia. Referred to as the Heart of Asia, it is bordere ...
.


Notable strategic bombers


Nomenclature

Bombers listed below were used in the main or represented a shift in long-range bomber design (Maximum bomb load). In practice, bomb loads carried are dependent on factors such as the distance to target and the individual type, size or weight of bombs used.
Nomenclature Nomenclature (, ) is a system of names or terms, or the rules for forming these terms in a particular field of arts or sciences. The principles of naming vary from the relatively informal conventions of everyday speech to the internationally ag ...
for size classification of aircraft types used in
strategic bombing Strategic bombing is a military strategy used in total war with the goal of defeating the enemy by destroying its morale, its economic ability to produce and transport materiel to the theatres of military operations, or both. It is a systematica ...
varies, particularly since the time of World War II due to sequential technological advancements and changes in aerial warfare strategy and tactics. The B-29, for example was a benchmark aircraft of the
heavy bomber Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry (usually bombs) and longest range (takeoff to landing) of their era. Archetypal heavy bombers have therefore usually been among the larges ...
type at end of
World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposing ...
due to its size, range and load carrying ability; as the Cold War began, it became an intercontinental range strategic bomber with the development of new techniques, such as aerial refueling (which also greatly extended the range of other medium- to long-range
bomber A bomber is a military combat aircraft designed to attack ground and naval targets by dropping air-to-ground weaponry (such as bombs), launching torpedoes, or deploying air-launched cruise missiles. The first use of bombs dropped from an air ...
s, fighter-bombers and attack aircraft). During the 1950s the U.S. Strategic Air Command also briefly brought back the outdated term "
medium bomber A medium bomber is a military bomber aircraft designed to operate with medium-sized bombloads over medium range distances; the name serves to distinguish this type from larger heavy bombers and smaller light bombers. Mediums generally carrie ...
" to distinguish its
Boeing B-47 Stratojet The Boeing B-47 Stratojet (Boeing company designation Model 450) is a retired American long- range, six-engined, turbojet-powered strategic bomber designed to fly at high subsonic speed and at high altitude to avoid enemy interceptor aircraft ...
s from somewhat larger contemporary Boeing B-52 Stratofortress "
heavy bomber Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry (usually bombs) and longest range (takeoff to landing) of their era. Archetypal heavy bombers have therefore usually been among the larges ...
s" in bombardment wings; older B-29 and B-50
heavy bomber Heavy bombers are bomber aircraft capable of delivering the largest payload of air-to-ground weaponry (usually bombs) and longest range (takeoff to landing) of their era. Archetypal heavy bombers have therefore usually been among the larges ...
s were also redesignated as "medium" during this period. SAC's
nomenclature Nomenclature (, ) is a system of names or terms, or the rules for forming these terms in a particular field of arts or sciences. The principles of naming vary from the relatively informal conventions of everyday speech to the internationally ag ...
here was purely semantic and bureaucratic, however as both the B-47 and B-52 strategic bombers were much larger and had far greater performance and load-carrying ability than any of the World War II-era heavy or medium bombers. Other aircraft such as the twin- jet US FB-111,
Douglas A-3 Skywarrior The Douglas A-3 Skywarrior is a jet-powered strategic bomber that was developed and produced by the Douglas Aircraft Company. It was designed by Douglas on behalf of the United States Navy, which sought a carrier-capable strategic bomber. D ...
and
France France (), officially the French Republic ( ), is a country primarily located in Western Europe. It also comprises of overseas regions and territories in the Americas and the Atlantic, Pacific and Indian Oceans. Its metropolitan area ...
's
Dassault Mirage IV The Dassault Mirage IV was a French supersonic strategic bomber and deep- reconnaissance aircraft. Developed by Dassault Aviation, the aircraft entered service with the French Air Force in October 1964. For many years it was a vital part of ...
had nominal warloads of less than , and were significantly smaller in size and gross weight compared with their strategic bomber contemporaries, based on which they might be classified as
medium bomber A medium bomber is a military bomber aircraft designed to operate with medium-sized bombloads over medium range distances; the name serves to distinguish this type from larger heavy bombers and smaller light bombers. Mediums generally carrie ...
s. In the nuclear strike role, France would replace its Mirage IVs beginning in the late 1980s with the even smaller, single-engine
Mirage 2000N The Dassault Mirage 2000N is a variant of the Dassault Mirage 2000, Mirage 2000 designed for nuclear strike. It formed the core of the French air-based Strategic nuclear weapon, strategic nuclear Deterrence theory, deterrent. The Mirage 2000D ...
fighter-bomber, a further example of advancing technologies and changing tactics in military aviation and aircraft design. France's newer twin-engine
Dassault Rafale The Dassault Rafale (, literally meaning "gust of wind", and "burst of fire" in a more military sense) is a French twin-engine, canard delta wing, multirole fighter aircraft designed and built by Dassault Aviation. Equipped with a wide range ...
multirole fighter also has nuclear strike capability.


World War I

* Caproni Ca.1 * Caproni Ca.3 () * Gotha G.IV () * Zeppelin Staaken R.VI () *
Zeppelin A Zeppelin is a type of rigid airship named after the German inventor Count Ferdinand von Zeppelin () who pioneered rigid airship development at the beginning of the 20th century. Zeppelin's notions were first formulated in 1874Eckener 1938, pp ...
(about ) * Handley Page Type O () *
Handley Page V/1500 The Handley Page V/1500 was a British night-flying heavy bomber built by Handley Page towards the end of the First World War. It was a large four-engined biplane, which resembled a larger version of Handley Page's earlier O/100 and O/400 bombers ...
() *
Sikorsky Ilya Muromets The Sikorsky ''Ilya Muromets'' (russian: Сикорский Илья Муромец) (Sikorsky S-22, S-23, S-24, S-25, S-26 and S-27) were a class of Russian pre-World War I large four-engine commercial airliners and military heavy bombers use ...
()


Interwar/World War II

* Boeing YB-9 (prototype strategic bomber, inspiration for the B-17) *
Martin B-10 The Martin B-10 was the first all-metal monoplane bomber to be regularly used by the United States Army Air Corps, entering service in June 1934.Jackson 2003, p. 246. It was also the first mass-produced bomber whose performance was superior to ...
(successors B-17 and B-24 therefore and theoretically the first strategic bomber of the USAAF at that time despite being a medium bomber.) * Boeing B-17 Flying Fortress () (theoretical maximum: ) * Consolidated B-24 Liberator () * Boeing B-29 Superfortress () (maximum of (2 Grand Slams)) *
Consolidated B-32 Dominator The Consolidated B-32 Dominator (Consolidated Model 34) was an American heavy strategic bomber built for United States Army Air Forces during World War II, which had the distinction of being the last Allied aircraft to be engaged in combat duri ...
() *
Handley Page Halifax The Handley Page Halifax is a British Royal Air Force (RAF) four-engined heavy bomber of the Second World War. It was developed by Handley Page to the same specification as the contemporary twin-engine Avro Manchester. The Halifax has its orig ...
()for the Mark III * Avro Lancaster () * Short Stirling () * Farman F.220 () *
Heinkel He 177 The Heinkel He 177 ''Greif'' (Griffin) was a long-range heavy bomber flown by the ''Luftwaffe'' during World War II. The introduction of the He 177 to combat operations was significantly delayed, by both problems with the development of its ...
() *
Petlyakov Pe-8 The Petlyakov Pe-8 (russian: Петляков Пе-8) was a Soviet heavy bomber designed before World War II, and the only four-engine bomber the USSR built during the war. Produced in limited numbers, it was used to bomb Berlin in August 1941. ...
() * Piaggio P.108 ()


Cold War

Weapons loads can include nuclear-armed
missile In military terminology, a missile is a guided airborne ranged weapon capable of self-propelled flight usually by a jet engine or rocket motor. Missiles are thus also called guided missiles or guided rockets (when a previously unguided rocke ...
s as well as aerial bombs * Reciprocating/
Turbine A turbine ( or ) (from the Greek , ''tyrbē'', or Latin ''turbo'', meaning vortex) is a rotary mechanical device that extracts energy from a fluid flow and converts it into useful work. The work produced by a turbine can be used for generating ...
engine **
Lockheed P-2 Neptune The Lockheed P-2 Neptune (designated P2V by the United States Navy prior to September 1962) is a maritime patrol and anti-submarine warfare (ASW) aircraft. It was developed for the US Navy by Lockheed to replace the Lockheed PV-1 Ventura and ...
– small number converted as carrier-launched nuclear-armed bombers which would have to ditch/recover at land bases ** Boeing B-50 Superfortress () **
Convair B-36 Peacemaker The Convair B-36 "Peacemaker" is a strategic bomber that was built by Convair and operated by the United States Air Force (USAF) from 1949 to 1959. The B-36 is the largest mass-produced Reciprocating engine, piston-engined aircraft ever built. It ...
() **
Tupolev Tu-4 The Tupolev Tu-4 (russian: Туполев Ту-4; NATO reporting name: Bull) is a piston-engined Soviet strategic bomber that served the Soviet Air Force from the late 1940s to mid-1960s. It was reverse-engineered from the American Boeing B-29 ...
reverse-engineered version of B-29 Superfortress ** Tupolev Tu-95 () ** Avro Lincoln () * Jet engine **
North American B-45 Tornado The North American B-45 Tornado was an early American jet bomber designed and manufactured by aircraft company North American Aviation. It has the distinction of being the first operational jet bomber to enter service with the United States Ai ...
() **
Boeing B-47 Stratojet The Boeing B-47 Stratojet (Boeing company designation Model 450) is a retired American long- range, six-engined, turbojet-powered strategic bomber designed to fly at high subsonic speed and at high altitude to avoid enemy interceptor aircraft ...
() **
Douglas A-3 Skywarrior The Douglas A-3 Skywarrior is a jet-powered strategic bomber that was developed and produced by the Douglas Aircraft Company. It was designed by Douglas on behalf of the United States Navy, which sought a carrier-capable strategic bomber. D ...
– nuclear-armed, carrier-based ** Boeing B-52 Stratofortress () **
Myasishchev M-4 The Myasishchev M-4 ''Molot'' (russian: Молот (Hammer), USAF/DoD reporting name "Type 37", ASCC reporting name Bison) was a four-engined strategic bomber designed by Vladimir Mikhailovich Myasishchev and manufactured by the Soviet Union in ...
() **
Tupolev Tu-16 The Tupolev Tu-16 (NATO reporting name: Badger) is a twin-engined jet strategic heavy bomber used by the Soviet Union. It has been flown for almost 70 years, and the Chinese license-built Xian H-6 remains in service with the People's Liberation ...
() ** Vickers Valiant () **
Avro Vulcan The Avro Vulcan (later Hawker Siddeley Vulcan from July 1963) is a jet-powered, tailless, delta-wing, high-altitude, strategic bomber, which was operated by the Royal Air Force (RAF) from 1956 until 1984. Aircraft manufacturer A.V. Roe an ...
() **
Handley Page Victor The Handley Page Victor is a British jet-powered strategic bomber developed and produced by Handley Page during the Cold War. It was the third and final '' V bomber'' to be operated by the Royal Air Force (RAF), the other two being the Avr ...
() **
Xian H-6 The Xian H-6 () is a twin-engine jet bomber of the Chinese People's Liberation Army Air Force (PLAAF). The H-6 is a license-built version of the Soviet Tupolev Tu-16 and remains the primary bomber aircraft of the People's Republic of China. D ...
() * Supersonic **
Convair B-58 Hustler The Convair B-58 Hustler, designed and produced by American aircraft manufacturer Convair, was the first operational bomber capable of Mach 2 flight. The B-58 was developed during the 1950s for the United States Air Force (USAF) Strategic Air ...
() ** General Dynamics FB-111A – strategic bomber version of the
F-111 The General Dynamics F-111 Aardvark is a retired supersonic, medium-range, multirole combat aircraft. Production variants of the F-111 had roles that included ground attack (e.g. interdiction), strategic bombing (including nuclear weapons ca ...
swing wing
strike aircraft An attack aircraft, strike aircraft, or attack bomber is a tactical military aircraft that has a primary role of carrying out airstrikes with greater precision than bombers, and is prepared to encounter strong low-level air defenses while pres ...
** North American A-5 Vigilante – nuclear-armed, carrier-based (only deployed for a brief period in strategic nuclear strike role for which it was originally designed before transitioning to reconnaissance role) **
Rockwell B-1 Lancer The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy bomber used by the United States Air Force. It is commonly called the "Bone" (from "B-One"). It is one of three strategic bombers serving in the U.S. Air Force fleet along with ...
( – use of external hardpoints restricted by START I) **
Dassault Mirage IV The Dassault Mirage IV was a French supersonic strategic bomber and deep- reconnaissance aircraft. Developed by Dassault Aviation, the aircraft entered service with the French Air Force in October 1964. For many years it was a vital part of ...
() **
Tupolev Tu-22M The Tupolev Tu-22M (russian: Туполев Ту-22М; NATO reporting name: Backfire) is a supersonic, variable-sweep wing, long-range strategic and maritime strike bomber developed by the Tupolev Design Bureau in the 1960s. According to some ...
Backfire () ** Tupolev Tu-160 Blackjack () **
Tupolev Tu-22 The Tupolev Tu-22 (NATO reporting name: Blinder) was the first supersonic bomber to enter production in the Soviet Union. Manufactured by Tupolev, the Tu-22 entered service with the Soviet military in the 1960s. The aircraft was a disappointm ...
Blinder () ** others designed and built which did not enter operational service: ***
North American XB-70 Valkyrie The North American Aviation XB-70 Valkyrie was the prototype version of the planned B-70 nuclear-armed, deep-penetration supersonic strategic bomber for the United States Air Force Strategic Air Command. Designed in the late 1950s by North Ame ...
*** Myasishchev M-50 Bounder ***
Sukhoi T-4 The Sukhoi T-4, or "Aircraft 100", or "Project 100", or "Sotka" was a Soviet high-speed reconnaissance, anti-ship and strategic bomber aircraft that did not proceed beyond the prototype stage. It is sometimes called the Su-100. Design and devel ...
Sotka ***
BAC TSR-2 The British Aircraft Corporation TSR-2 is a cancelled Cold War strike and reconnaissance aircraft developed by the British Aircraft Corporation (BAC), for the Royal Air Force (RAF) in the late 1950s and early 1960s. The TSR-2 was designed ...


Post Cold War

* Northrop Grumman B-2 Spirit ()


List of active strategic bombers

* Northrop Grumman B-2 Spirit () * Boeing B-52 Stratofortress () *
Rockwell B-1 Lancer The Rockwell B-1 Lancer is a supersonic variable-sweep wing, heavy bomber used by the United States Air Force. It is commonly called the "Bone" (from "B-One"). It is one of three strategic bombers serving in the U.S. Air Force fleet along with ...
() *
Xian H-6 The Xian H-6 () is a twin-engine jet bomber of the Chinese People's Liberation Army Air Force (PLAAF). The H-6 is a license-built version of the Soviet Tupolev Tu-16 and remains the primary bomber aircraft of the People's Republic of China. D ...
Badger () *
Tupolev Tu-22M The Tupolev Tu-22M (russian: Туполев Ту-22М; NATO reporting name: Backfire) is a supersonic, variable-sweep wing, long-range strategic and maritime strike bomber developed by the Tupolev Design Bureau in the 1960s. According to some ...
Backfire () * Tupolev Tu-95 Bear () * Tupolev Tu-160 Blackjack ()


Future

*
Xian H-20 The Xian H-20 (; alternatively Xian H-X) is a projected subsonic stealth bomber design of the People's Liberation Army Air Force. It is referred to as a strategic project by the People's Liberation Army. The H-20 will be the first dedicated stra ...
. An under-development stealth bomber by China. Planned to be deployed in 2025. *
Northrop Grumman B-21 Raider The Northrop Grumman B-21 Raider is an American strategic bomber under development for the United States Air Force (USAF) by Northrop Grumman. As part of the Long Range Strike Bomber (LRS-B) program, it is to be a long-range, stealth intercon ...
. An under-development stealth bomber by the United States, with a goal of supplanting a portion or all of the current Boeing B-52 Stratofortress. *
Tupolev PAK DA The Tupolev PAK DA or PAK DA (russian: ПАК ДА, russian: label=short for, Перспективный авиационный комплекс дальней авиации, Perspektivnyi aviatsionnyi kompleks dal'ney aviatsii, 'Prospective avi ...
. An under-development stealth bomber by Russia, with a goal of supplanting a portion or all of the current Tupolev Tu-95. Planned to be deployed in 2027.


See also

* Carpet bombing *
High level bombing High level bombing (also called high-altitude bombing) is a tactic of dropping bombs from bomber aircraft in level flight at high altitude. The term is used in contrast to both World War II-era dive bombing and medium or low level bombing. Prio ...
* Long Range Strike Bomber program *
Next-Generation Bomber The Next-Generation Bomber (NGB; unofficially called 2018 Bomber) was a program to develop a new medium bomber for the United States Air Force. The NGB was initially projected to enter service around 2018 as a stealthy, subsonic, medium-range, m ...
* Northrop Grumman B-2 Spirit *
Northrop Grumman B-21 Raider The Northrop Grumman B-21 Raider is an American strategic bomber under development for the United States Air Force (USAF) by Northrop Grumman. As part of the Long Range Strike Bomber (LRS-B) program, it is to be a long-range, stealth intercon ...
*
Strategic bombing Strategic bombing is a military strategy used in total war with the goal of defeating the enemy by destroying its morale, its economic ability to produce and transport materiel to the theatres of military operations, or both. It is a systematica ...
*
Tactical bombing Tactical bombing is aerial bombing aimed at targets of immediate military value, such as combatants, military installations, or military equipment. This is in contrast to strategic bombing, or attacking enemy cities and factories to crippl ...
*
Tupolev PAK DA The Tupolev PAK DA or PAK DA (russian: ПАК ДА, russian: label=short for, Перспективный авиационный комплекс дальней авиации, Perspektivnyi aviatsionnyi kompleks dal'ney aviatsii, 'Prospective avi ...


References

* Brown, Michael E. Flying Blind: The Politics of the U.S. Strategic Bomber Program. Ithaca, NY: Cornell University Press, 1992. * Cross, Robin. The Bombers: The Illustrated Story of Offensive Strategy and Tactics in the Twentieth Century. New York: Macmillan, 1987. * Green, William. Famous Bombers of the Second World War. New York: Doubleday, 1959, 1960 (two vols). * Green, William. Warplanes of the Third Reich. New York: Doubleday, 1970. * Haddow, G. W., and Peter M. Grosz The German Giants: The German R-Planes 1914–1918. London: Putnam, 1969 (2nd ed.) * Hastings, Max. Bomber Command. New York: Dial Press, 1979 * Jones, Lloyd S. U.S. Bombers 1926 to 1980s. Fallbrook, CA: Aero Publishers, 1980 (3rd ed.) * Neillands, Robin. The Bomber War: The Allied Offensive Against Nazi Germany. Woodstock, NY: Overlook, 2001. * Robinson, Douglas H. The Zeppelin in Combat: A History of the German Naval Airship Division, 1912–1918. Atglen, PA: Schiffer, 1994. * United States Strategic Bombing Survey. Over-all Report (European War). Washington: Government Printing Office, September 30, 1945. {{authority control Bomber aircraft Russian inventions Strategic bombers