Type 89 I-Go
The was a medium tank used by the Imperial Japanese Army from 1932 to 1942 in combat operations of the Second Sino-Japanese War, at Khalkhin Gol against the Soviet Union, and in the Second World War. The Type 89B model was the world's first mass-produced diesel engine tank. The tank was armed with a short-barrel 57 mm cannon for knocking out pillboxes and masonry fortifications, and proved effective in campaigns in Manchuria and China, as the Chinese National Revolutionary Army had only three tank battalions to oppose them, which consisted primarily of Vickers export models, German Panzer Is, and Italian CV33 tankettes. The Type 89 was a 1920s design medium tank, built to support the infantry, and thus lacked the armor or armament of 1940s generation Allied armor; it was regarded as obsolete by the time of the 1939 battles of Khalkhin Gol, against the Soviet Union. The code designation "I-Go" comes from the ''katakana'' letter ��for “first” and the ''kanji'' ��for ...
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Medium Tank
A medium tank is a classification of tanks, particularly prevalent during World War II which represented a compromise between the mobility oriented light tanks and the armour and armament oriented heavy tanks. A medium tank's classification is not actually based on weight, but off of tactical usage and intended purpose; for instance the German Panzerkampfwagen V Panther medium tank has a mass similar to contemporary Allied heavy tanks. The most widely produced, cost effective and successful tanks of World War II (the German Panzer IV, the Soviet T-34, and the American M4 Sherman) were all medium tank designs. Many of the medium tank lines became what are called main battle tanks in most countries. History The first tanks to carry the name "Medium" appeared in the First World War with the British Medium Mark A Whippet. It was smaller, lighter and faster than the British heavy tanks of the time and only carried machine guns. The medium tank doctrine came into use in the interwa ...
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Panzer I
The Panzer I was a light tank produced in Nazi Germany in the 1930s. Its name is short for (German for "armored fighting vehicle mark I"), abbreviated as . The tank's official German ordnance inventory designation was ''Sd.Kfz. 101'' ("special purpose vehicle 101"). Design of the Panzer I began in 1932 and mass production began in 1934. Intended only as a training tank to introduce the concept of armored warfare to the German Army, the Panzer I saw combat in Spain during the Spanish Civil War, in Poland, France, the Soviet Union and North Africa during the Second World War, and in China during the Second Sino-Japanese War. Experiences with the Panzer I during the Spanish Civil War helped shape the German Panzerwaffe's invasion of Poland in 1939 and France in 1940. By 1941, the Panzer I chassis design was used as the basis of tank destroyers and assault guns. There were attempts to upgrade the Panzer I throughout its service history, including ...
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Iron
Iron () is a chemical element with symbol Fe (from la, ferrum) and atomic number 26. It is a metal that belongs to the first transition series and group 8 of the periodic table. It is, by mass, the most common element on Earth, right in front of oxygen (32.1% and 30.1%, respectively), forming much of Earth's outer and inner core. It is the fourth most common element in the Earth's crust. In its metallic state, iron is rare in the Earth's crust, limited mainly to deposition by meteorites. Iron ores, by contrast, are among the most abundant in the Earth's crust, although extracting usable metal from them requires kilns or furnaces capable of reaching or higher, about higher than that required to smelt copper. Humans started to master that process in Eurasia during the 2nd millennium BCE and the use of iron tools and weapons began to displace copper alloys, in some regions, only around 1200 BCE. That event is considered the transition from the Bronze Age to the Iron A ...
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Muzzle Velocity
Muzzle velocity is the speed of a projectile (bullet, pellet, slug, ball/shots or shell) with respect to the muzzle at the moment it leaves the end of a gun's barrel (i.e. the muzzle). Firearm muzzle velocities range from approximately to in black powder muskets, to more than in modern rifles with high-velocity cartridges such as the .220 Swift and .204 Ruger, all the way to for tank guns firing kinetic energy penetrator ammunition. To simulate orbital debris impacts on spacecraft, NASA launches projectiles through light-gas guns at speeds up to . Projectile velocity For projectiles in unpowered flight, its velocity is highest at leaving the muzzle and drops off steadily because of air resistance. Projectiles traveling less than the speed of sound (about in dry air at sea level) are ''subsonic'', while those traveling faster are ''supersonic'' and thus can travel a substantial distance and even hit a target before a nearby observer hears the "bang" of the shot. Projec ...
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Type 11 Light Machine Gun
The was a light machine gun used by the Imperial Japanese Army in the interwar period and during World War II. History Combat experience in the Russo-Japanese War of 1904–1905 had convinced the Japanese of the utility of machine guns in providing covering fire for advancing infantry. This was reinforced by first-hand observations of European combat tactics by Japanese military attachés during the First World War, and the Army Technical Bureau was tasked with the development of a lightweight machine gun which could be easily transported by an infantry squad. The resultant "Type 11 light machine gun" (named after the 11th year of the reign of Emperor Taishō, or 1922) was the first light machine gun to be mass-produced in Japan and the oldest Japanese light machine gun design to see service in the Pacific War. It was superseded by the Type 96 light machine gun in 1936. Design details The Type 11 light machine gun was a design by famed arms designer Kijirō Nambu, based o ...
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IJA Type 89 Medium Tank Ko Earlymodel
IJA may refer to: * Imperial Japanese Army * ''International Journal of Astrobiology'' * International Jugglers' Association * ''International Journal of Audiology'' * International Juridical Association The International Juridical Association (IJA; 1931–1942) was an association of socially minded American lawyers, established by Carol Weiss King and considered by the U.S. federal government (in the form of the U.S. House Un-American Activities ...

Mitsubishi Heavy Industries
is a Japanese multinational engineering, electrical equipment and electronics corporation headquartered in Tokyo, Japan. MHI is one of the core companies of the Mitsubishi Group and its automobile division is the predecessor of Mitsubishi Motors. MHI's products include aerospace and automotive components, air conditioners, elevators, forklift trucks, hydraulic equipment, printing machines, missiles, tanks, power systems, ships, aircraft, railway systems, and space launch vehicles. Through its defense-related activities, it is the world's 23rd-largest defense contractor measured by 2011 defense revenues and the largest based in Japan. History In 1857, at the request of the Tokugawa Shogunate, a group of Dutch engineers were invited, including Dutch naval engineer Hendrik Hardes, and began work on the ''Nagasaki Yotetsusho'' 長崎鎔鉄所 , a modern, Western-style foundry and shipyard near the Dutch settlement of Dejima, at Nagasaki. This was renamed ''Naga ...
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Imperial Japanese Army General Staff Office
The , also called the Army General Staff, was one of the two principal agencies charged with overseeing the Imperial Japanese Army. Role The was created in April 1872, along with the Navy Ministry, to replace the Ministry of Military Affairs (''Hyōbushō'') of the early Meiji government. Initially, the Army Ministry was in charge of both administration and operational command of the Imperial Japanese Army however, from December 1878, the Imperial Army General Staff Office took over all operational control of the Army, leaving the Army Ministry only with administrative functions. The Imperial Army General Staff was thus responsible for the preparation of war plans; the military training and employment of combined arms military intelligence; the direction of troop maneuvers; troop deployments; and the compilation of field service military regulations, military histories, and cartography. The Chief of the Army General Staff was the senior ranking uniformed officer in the Imper ...
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Type 87 Chi-I
The Type 87 Chi-I medium tank a/k/a Experimental tank No.1 (試製1 号戦車) was the first indigenously designed tank produced by Japan for the Imperial Japanese Army. Development of this medium tank began in June 1925 and was completed by February 1927. During the field trials, the tank proved to be too heavy and under-powered. The project was cancelled and a new light tank design was finished by April 1928 and designated the Type 89 I-Go. History Development of the first Japanese-designed tank began in June 1925. The original plan was for two types of tanks to be created. A light tank at 10-ton based on the French Renault FT tank and a 20-ton design modelled after the British Vickers tanks. A team of four engineers in the motorcar group of the Technical Bureau participated in the development of the medium tank, including a young army officer, Major Tomio Hara. Major Hara later became the head of the tank development department and would rise to the rank of general. According ...
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IJA Experimental Tank No1 01
IJA may refer to: * Imperial Japanese Army * ''International Journal of Astrobiology'' * International Jugglers' Association * ''International Journal of Audiology'' * International Juridical Association The International Juridical Association (IJA; 1931–1942) was an association of socially minded American lawyers, established by Carol Weiss King and considered by the U.S. federal government (in the form of the U.S. House Un-American Activities ...

Kanji
are the logographic Chinese characters taken from the Chinese family of scripts, Chinese script and used in the writing of Japanese language, Japanese. They were made a major part of the Japanese writing system during the time of Old Japanese and are still used, along with the subsequently-derived syllabic scripts of ''hiragana'' and ''katakana''. The characters have Japanese pronunciation, pronunciations; most have two, with one based on the Chinese sound. A few characters were invented in Japan by constructing character components derived from other Chinese characters. After World War II, Japan made its own efforts to simplify the characters, now known as shinjitai, by a process similar to China's simplified Chinese characters, simplification efforts, with the intention to increase literacy among the common folk. Since the 1920s, the Japanese government has published character lists periodically to help direct the education of its citizenry through the myriad Chinese characte ...
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Katakana
is a Japanese syllabary, one component of the Japanese writing system along with hiragana, kanji and in some cases the Latin script (known as rōmaji). The word ''katakana'' means "fragmentary kana", as the katakana characters are derived from components or fragments of more complex kanji. Katakana and hiragana are both kana systems. With one or two minor exceptions, each syllable (strictly mora) in the Japanese language is represented by one character or ''kana'' in each system. Each kana represents either a vowel such as "''a''" (katakana ア); a consonant followed by a vowel such as "''ka''" (katakana カ); or "''n''" (katakana ン), a nasal sonorant which, depending on the context, sounds either like English ''m'', ''n'' or ''ng'' () or like the nasal vowels of Portuguese or Galician. In contrast to the hiragana syllabary, which is used for Japanese words not covered by kanji and for grammatical inflections, the katakana syllabary usage is comparable to italics in En ...
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