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was the largely successful withdrawal of Japanese forces from
Guadalcanal Guadalcanal (; indigenous name: ''Isatabu'') is the principal island in Guadalcanal Province of Solomon Islands, located in the south-western Pacific, northeast of Australia. It is the largest island in the Solomon Islands by area, and the seco ...
, concluding the
Guadalcanal Campaign The Guadalcanal campaign, also known as the Battle of Guadalcanal and codenamed Operation Watchtower by American forces, was a military campaign fought between 7 August 1942 and 9 February 1943 on and around the island of Guadalcanal in th ...
of . The operation took place between 14 January and 7 February 1943, and involved both
Imperial Japanese Army The was the official ground-based armed force of the Empire of Japan from 1868 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of the Army, both of which were nominally subordinate to the Emperor o ...
(IJA) and
Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender ...
(IJN) forces under the overall direction of the Japanese Imperial General Headquarters (IGH). Commanders of the operation included
Isoroku Yamamoto was a Marshal Admiral of the Imperial Japanese Navy (IJN) and the commander-in-chief of the Combined Fleet during World War II until he was killed. Yamamoto held several important posts in the IJN, and undertook many of its changes and reor ...
and
Hitoshi Imamura was a Japanese general who served in the Imperial Japanese Army during World War II, and was subsequently convicted of war crimes. Early career A native of Sendai city, Miyagi Prefecture, Imamura's father was a judge. Imamura graduated from t ...
. The Japanese decided to withdraw and concede Guadalcanal to
Allied An alliance is a relationship among people, groups, or states that have joined together for mutual benefit or to achieve some common purpose, whether or not explicit agreement has been worked out among them. Members of an alliance are called ...
forces for several reasons. All attempts by the IJA to recapture Henderson Field, the airfield on Guadalcanal in use by Allied aircraft, had been repulsed with heavy losses. Japanese ground forces on the island had been reduced from 36,000 to 11,000 through starvation, disease, and battle casualties. IJN forces were also suffering heavy losses attempting to reinforce and resupply the ground forces on the island. These losses, plus the projected resources needed for further attempts to recapture Guadalcanal, were affecting strategic security and operations in other areas of the Japanese Empire. The decision to withdraw was endorsed by
Emperor An emperor (from la, imperator, via fro, empereor) is a monarch, and usually the sovereignty, sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife (empress consort), ...
Hirohito on 31 December 1942. The operation began on 14 January 1943 with the delivery of a battalion of infantry troops to Guadalcanal to act as
rearguard A rearguard is a part of a military force that protects it from attack from the rear, either during an advance or withdrawal. The term can also be used to describe forces protecting lines, such as communication lines, behind an army. Even more ...
for the evacuation. Around the same time, IJA and IJN air forces began an
air superiority Aerial supremacy (also air superiority) is the degree to which a side in a conflict holds control of air power over opposing forces. There are levels of control of the air in aerial warfare. Control of the air is the aerial equivalent of c ...
campaign around the Solomon Islands and New Guinea. During the air campaign, a US
cruiser A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several roles. The term "cruiser", which has been in use for several hu ...
was sunk in the
Battle of Rennell Island The took place on 29–30 January 1943. It was the last major naval engagement between the United States Navy and the Imperial Japanese Navy during the Guadalcanal Campaign of World War II. It occurred in the South Pacific between Rennell ...
. Two days later, Japanese aircraft sank a US
destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...
near Guadalcanal. The withdrawal was carried out on the nights of 1, 4, and 7 February by destroyers. At a cost of one destroyer sunk and three damaged, the Japanese evacuated 10,652 men from Guadalcanal. During the evacuation 600 died and 3,000 more required extensive hospital care. On 9 February, Allied forces realized that the Japanese were gone and declared Guadalcanal secure, ending the six-month campaign for control of the island.


Background


Guadalcanal Campaign

On 7 August 1942, the US 1st Marine Division landed on Guadalcanal,
Tulagi Tulagi, less commonly known as Tulaghi, is a small island——in Solomon Islands, just off the south coast of Ngella Sule. The town of the same name on the island (pop. 1,750) was the capital of the British Solomon Islands Protectorate from 18 ...
, and Florida Islands in the
Solomon Islands Solomon Islands is an island country consisting of six major islands and over 900 smaller islands in Oceania, to the east of Papua New Guinea and north-west of Vanuatu. It has a land area of , and a population of approx. 700,000. Its capita ...
. The landings on the islands were meant to deny their use by the Japanese as bases for threatening the supply routes between the US and Australia, and to secure the islands as starting points for a campaign with the eventual goal of capturing or neutralizing the major Japanese base at
Rabaul Rabaul () is a township in the East New Britain province of Papua New Guinea, on the island of New Britain. It lies about 600 kilometres to the east of the island of New Guinea. Rabaul was the provincial capital and most important settlement in ...
while also supporting the Allied
New Guinea campaign The New Guinea campaign of the Pacific War lasted from January 1942 until the end of the war in August 1945. During the initial phase in early 1942, the Empire of Japan invaded the Australian-administered Mandated Territory of New Guinea (23 Jan ...
. The landings initiated the six-month-long Guadalcanal campaign. Taking the Japanese by surprise, by nightfall on 8 August the Marines secured Tulagi and nearby islands as well as the Japanese airfield under construction at Lunga Point on Guadalcanal. The Allies later renamed it "Henderson Field". Allied aircraft operating out of Henderson were called the " Cactus Air Force" (CAF) after the Allied code name for Guadalcanal. In response to the landings on Guadalcanal, the Japanese Imperial General Headquarters (IGH) assigned the
Imperial Japanese Army The was the official ground-based armed force of the Empire of Japan from 1868 to 1945. It was controlled by the Imperial Japanese Army General Staff Office and the Ministry of the Army, both of which were nominally subordinate to the Emperor o ...
's (IJA) 17th Army, a
corps Corps (; plural ''corps'' ; from French , from the Latin "body") is a term used for several different kinds of organization. A military innovation by Napoleon I, the formation was first named as such in 1805. The size of a corps varies great ...
-sized command headquartered at Rabaul under the command of Lieutenant General
Harukichi Hyakutake was a general in the Japanese Imperial Army in World War II. He is sometimes referred to as Haruyoshi Hyakutake or Seikichi Hyakutake. His elder brothers Saburō Hyakutake and Gengo Hyakutake were admirals in the Imperial Japanese Navy. Biograph ...
, the task of retaking Guadalcanal. Because of the threat by CAF aircraft, the
Imperial Japanese Navy The Imperial Japanese Navy (IJN; Kyūjitai: Shinjitai: ' 'Navy of the Greater Japanese Empire', or ''Nippon Kaigun'', 'Japanese Navy') was the navy of the Empire of Japan from 1868 to 1945, when it was dissolved following Japan's surrender ...
(IJN) was unable to use large, slow transport ships to deliver troops and supplies to the island. Instead, warships based at Rabaul and the
Shortland Islands The Shortland Islands is an archipelago of Western Province, Solomon Islands, at . The island group lies in the extreme north-west of the country's territory, close to the south-east edge of Bougainville Island, Papua New Guinea. The largest isl ...
were used to carry forces to Guadalcanal. The Japanese warships, mainly light
cruiser A cruiser is a type of warship. Modern cruisers are generally the largest ships in a fleet after aircraft carriers and amphibious assault ships, and can usually perform several roles. The term "cruiser", which has been in use for several hu ...
s and
destroyer In naval terminology, a destroyer is a fast, manoeuvrable, long-endurance warship intended to escort larger vessels in a fleet, convoy or battle group and defend them against powerful short range attackers. They were originally developed in ...
s from the Eighth Fleet under the command of Vice Admiral
Gunichi Mikawa was a vice-admiral in the Imperial Japanese Navy (IJN) during World War II. Mikawa was the commander of a heavy cruiser force that won a spectacular IJN victory over the U.S. Navy and the Royal Australian Navy at the Battle of Savo Island in I ...
, were usually able to make the round trip down " The Slot" to Guadalcanal and back in a single night, thereby minimizing their exposure to CAF air attack. These high speed warship runs to Guadalcanal occurred throughout the campaign and were later called the "
Tokyo Express The Tokyo Express was the name given by Allied forces to the use of Imperial Japanese Navy ships at night to deliver personnel, supplies, and equipment to Japanese forces operating in and around New Guinea and the Solomon Islands during the ...
" by Allied forces and "Rat Transportation" by the Japanese. Using forces delivered to Guadalcanal in this manner, the IJA tried three times to retake Henderson Field, but was defeated each time. After the third failure, an attempt by the IJN to deliver the rest of the IJA 38th Infantry Division and its heavy equipment failed during the
Naval Battle of Guadalcanal The Naval Battle of Guadalcanal, sometimes referred to as the Third and Fourth Battles of Savo Island, the Battle of the Solomons, the Battle of Friday the 13th, or, in Japanese sources, the , took place from 12 to 15 November 1942, and was t ...
from 12 to 15 November. Because of this failure, the Japanese cancelled their next planned attempt to recapture Henderson Field. In mid-November, Allied forces attacked the Japanese at Buna-Gona in New Guinea. Japanese
Combined Fleet The was the main sea-going component of the Imperial Japanese Navy. Until 1933, the Combined Fleet was not a permanent organization, but a temporary force formed for the duration of a conflict or major naval maneuvers from various units norm ...
naval leaders, headquartered at Truk and under the overall command of Admiral Isoroku Yamamoto, felt Allied advances in New Guinea posed a greater threat to the security of the Japanese Empire than an Allied military presence in the southern Solomons. Therefore, Combined Fleet naval staff officers began to prepare plans for abandoning Guadalcanal and shifting priorities and resources to operations around New Guinea. At this time, the navy did not inform the army of their intentions in this regard. As December began, the Japanese experienced considerable difficulty in keeping their troops on Guadalcanal resupplied because of Allied air and naval attacks on the Japanese supply chain of ships and bases. The few supplies delivered to the island were not enough to sustain Japanese troops who, by 7 December, were losing about 50 men each day to malnutrition, disease, and Allied ground or air attacks. The Japanese had delivered almost 30,000 army troops to Guadalcanal since the campaign began, but by December only about 20,000 of that number were still alive; of those, only around 12,000 remained more or less fit for combat duty, with the rest incapacitated by battle wounds, disease, or malnutrition. The IJN continued to suffer losses and damage to its ships in attempting to keep the Japanese on Guadalcanal resupplied. One destroyer was sunk by American warships at the
Battle of Tassafaronga The Battle of Tassafaronga, sometimes referred to as the Fourth Battle of Savo Island or, in Japanese sources, as the , was a nighttime naval battle that took place on November 30, 1942, between United States Navy and Imperial Japanese Navy warsh ...
on 30 November. Another destroyer plus a submarine were sunk and two destroyers damaged by American
PT boat A PT boat (short for patrol torpedo boat) was a motor torpedo boat used by the United States Navy in World War II. It was small, fast, and inexpensive to build, valued for its maneuverability and speed but hampered at the beginning of the wa ...
and CAF air attacks during subsequent resupply missions from 3–12 December. Compounding the navy's frustration, very few of the supplies carried on these missions reached IJA forces on the island. Combined Fleet leaders began telling their army counterparts the losses and damage to warships engaged in the resupply effort threatened future strategic plans for protecting the Japanese Empire.


Decision to withdraw

Throughout November, Japan's top military leaders at the IGH in Tokyo continued to openly support further efforts to retake Guadalcanal from Allied forces. At the same time, lower-ranking staff officers began to discreetly discuss abandoning the island.
Takushiro Hattori was an Imperial Japanese Army officer and government official. During World War II, he alternately served as the chief of the Army General Staff's Operations Section and secretary to Prime Minister Hideki Tojo. After the war ended, he served as an ...
and
Masanobu Tsuji was a Japanese army officer and politician. During World War II, he was an important tactical planner in the Imperial Japanese Army and developed the detailed plans for the successful Japanese invasion of Malaya at the start of the war. He al ...
, each of whom had recently visited Guadalcanal, told their colleagues on the staff that any further attempt to retake the island was a lost cause. Ryūzō Sejima reported that the attrition of IJA troop-strength on Guadalcanal was so unexpectedly severe that future operations would be untenable. On 11 December two staff officers, IJN Commander Yuji Yamamoto and IJA Major Takahiko Hayashi, returned to Tokyo from Rabaul and confirmed Hattori's, Tsuji's, and Sejima's reports. They further reported that most of the IJN and IJA officers at Rabaul appeared to support abandoning Guadalcanal. Around this time, Japan's War Ministry informed the IGH that there was insufficient shipping to support both the effort to retake Guadalcanal and transport strategic resources to maintain Japan's economy and military forces. On 19 December, a delegation of IGH staff officers led by IJA Colonel Joichiro Sanada, chief of the IGH's operations section, arrived at Rabaul for discussions about future plans concerning New Guinea and Guadalcanal.
Hitoshi Imamura was a Japanese general who served in the Imperial Japanese Army during World War II, and was subsequently convicted of war crimes. Early career A native of Sendai city, Miyagi Prefecture, Imamura's father was a judge. Imamura graduated from t ...
, commander of the 8th Area Army in charge of IJA operations in New Guinea and the Solomons, did not directly recommend a withdrawal from Guadalcanal but openly and clearly described the current difficulties involved with any further attempts to retake the island. Imamura also stated that any decision to withdraw should include plans to evacuate as many of the soldiers from Guadalcanal as possible. Sanada returned to Tokyo on 25 December and recommended to the IGH that Guadalcanal be abandoned immediately and all priority given to the campaign in New Guinea. The IGH's top leaders agreed with Sanada's recommendation on 26 December and ordered their staffs to begin drafting plans for the withdrawal from Guadalcanal and establishment of a new defense line in the central Solomons. On 28 December, General
Hajime Sugiyama was a Japanese field marshal and one of the leaders of Japan's military throughout most of World War II. As Army Minister in 1937, Sugiyama was a driving force behind the launch of hostilities against China in retaliation for the Marco Polo Bri ...
and Admiral
Osami Nagano was a Marshal Admiral of the Imperial Japanese Navy and one of the leaders of Japan's military during most of the Second World War. In April 1941, he became Chief of the Imperial Japanese Navy General Staff. In this capacity, he served as the n ...
personally informed
Emperor An emperor (from la, imperator, via fro, empereor) is a monarch, and usually the sovereignty, sovereign ruler of an empire or another type of imperial realm. Empress, the female equivalent, may indicate an emperor's wife (empress consort), ...
Hirohito of the decision to withdraw from Guadalcanal. On 31 December, the Emperor formally endorsed the decision.


Plan and forces

On 3 January, IGH informed the 8th Area Army and the Combined Fleet of the decision to withdraw from Guadalcanal. By 9 January, the Combined Fleet and 8th Area Army staffs together completed the plan, officially called Operation Ke after a
mora Mora may refer to: People * Mora (surname) Places Sweden * Mora, Säter, Sweden * Mora, Sweden, the seat of Mora Municipality * Mora Municipality, Sweden United States * Mora, Louisiana, an unincorporated community * Mora, Minnesota, a city * M ...
in Japanese
Kana The term may refer to a number of syllabaries used to write Japanese phonological units, morae. Such syllabaries include (1) the original kana, or , which were Chinese characters (kanji) used phonetically to transcribe Japanese, the most p ...
vocabulary, to execute the evacuation. The plan called for a battalion of IJA infantry to land by destroyer on Guadalcanal around 14 January to act as a rear guard during the evacuation. The 17th Army was to begin withdrawing to the western end of the island about 25 or 26 January. An
air superiority Aerial supremacy (also air superiority) is the degree to which a side in a conflict holds control of air power over opposing forces. There are levels of control of the air in aerial warfare. Control of the air is the aerial equivalent of c ...
campaign around the southern Solomons would begin on 28 January. The 17th Army would be picked up in three lifts by destroyers the first week of February with a target completion date of 10 February. At the same time, Japanese air and naval forces would conduct conspicuous maneuvers and minor attacks around New Guinea and the
Marshall Islands The Marshall Islands ( mh, Ṃajeḷ), officially the Republic of the Marshall Islands ( mh, Aolepān Aorōkin Ṃajeḷ),'' () is an independent island country and microstate near the Equator in the Pacific Ocean, slightly west of the Internati ...
along with deceptive radio traffic to try to confuse the Allies as to their intentions. Yamamoto detailed
aircraft carrier An aircraft carrier is a warship that serves as a seagoing airbase, equipped with a full-length flight deck and facilities for carrying, arming, deploying, and recovering aircraft. Typically, it is the capital ship of a fleet, as it allows a ...
s and , battleships and – with four heavy cruisers and a destroyer as the screening force – under
Nobutake Kondō was an admiral in the Imperial Japanese Navy during World War II. As commander of IJN 2nd Fleet, the Navy's principal detached force for independent operations, Kondō was regarded as second in importance only to Admiral Isoroku Yamamoto. Biog ...
to provide distant cover for ''Ke'' around
Ontong Java Ontong Java Atoll or Luangiua, (formerly ''Lord Howe Atoll'', not to be confused with Lord Howe Island) is one of the largest atolls on earth. Geographically it belongs to a scattered group of three atolls which includes nearby Nukumanu Atol ...
in the northern Solomons. The evacuation runs were to be carried out by Mikawa's 8th Fleet, consisting of heavy cruisers and , light cruiser , and 21 destroyers. Mikawa's destroyers were charged with conducting the evacuation. Yamamoto expected that at least half of Mikawa's destroyers would be sunk during the operation. Supporting the air superiority portion of the operation were the IJN's 11th Air Fleet and the IJA's 6th Air Division, based at Rabaul with 212 and 100 aircraft, respectively. 64 aircraft from carrier s air group were also temporarily assigned to Rabaul. An additional 60 floatplanes from the IJN's "R" Area Air Force, based at Rabaul, Bougainville and the Shortland Islands, brought the total number of Japanese aircraft involved in the operation to 436. The combined Japanese warship and naval air units in the area formed the
Southeast Area Fleet The was a fleet of the Imperial Japanese Navy established during World War II. History The Southeast Area Fleet was an operational command of the Imperial Japanese Navy combining the remaining surface elements of the IJN 8th Fleet with the IJ ...
, commanded by
Jinichi Kusaka , was an admiral in the Imperial Japanese Navy during World War II. Fellow Admiral Ryūnosuke Kusaka was his cousin. Biography A native of Ishikawa Prefecture, Kusaka graduated from the 37th class of the Imperial Japanese Navy Academy, ranked 21s ...
at Rabaul. Opposing the Japanese and under the command of
United States Navy The United States Navy (USN) is the maritime service branch of the United States Armed Forces and one of the eight uniformed services of the United States. It is the largest and most powerful navy in the world, with the estimated tonnage ...
Admiral Admiral is one of the highest ranks in some navies. In the Commonwealth nations and the United States, a "full" admiral is equivalent to a "full" general in the army or the air force, and is above vice admiral and below admiral of the fleet, ...
William Halsey Jr. William Frederick "Bull" Halsey Jr. (October 30, 1882 – August 16, 1959) was an American Navy admiral during World War II. He is one of four officers to have attained the rank of five-star fleet admiral of the United States Navy, the others ...
, commander of Allied forces in the South Pacific, were fleet carriers and , six
escort carrier The escort carrier or escort aircraft carrier (U.S. hull classification symbol CVE), also called a "jeep carrier" or "baby flattop" in the United States Navy (USN) or "Woolworth Carrier" by the Royal Navy, was a small and slow type of aircraft ...
s, three fast battleships, four old battleships, 13 cruisers, and 45 destroyers. In the air, the 13th Air Force numbered 92 fighters and bombers under
United States Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, cla ...
Brigadier General Brigadier general or Brigade general is a military rank used in many countries. It is the lowest ranking general officer in some countries. The rank is usually above a colonel, and below a major general or divisional general. When appointed ...
Nathan F. Twining and the CAF on Guadalcanal counted 81 aircraft under US Marine Brigadier General Francis P. Mulcahy. Rear Admiral
Aubrey Fitch Aubrey Wray Fitch (June 11, 1883 – May 22, 1978) was an admiral of the United States Navy during World War II. A naval aviator, he held important aviation-related commands both at sea and on shore from the 1920s onward. He also served as ...
was overall commander of Aircraft South Pacific. The air units of the fleet and escort carriers added another 339 aircraft. In addition, 30 heavy bombers were stationed in New Guinea with sufficient range to conduct missions over the Solomon Islands. In total, the Allies possessed around 539 aircraft available to oppose the ''Ke'' operation. By the first week of January, disease, starvation, and battle had reduced Hyakutake's command to about 14,000 troops, with many of them too sick and malnourished to fight. The 17th Army possessed three operable field cannon, with very little ammunition. In contrast, the Allied commander on the island, US Army Major General
Alexander Patch General Alexander McCarrell Patch (November 23, 1889 – November 21, 1945) was a senior United States Army officer who fought in both world wars, rising to rank of general. During World War II, he commanded U.S. Army and Marine Corps ...
, fielded a combined force of US Army and US Marines, designated the
XIV Corps 14 Corps, 14th Corps, Fourteenth Corps, or XIV Corps may refer to: * XIV Corps (Grande Armée), a unit of the Imperial French Army during the Napoleonic Wars * XIV Corps (German Empire), a unit of the Imperial German Army prior to and during World ...
, totaling 50,666 men. At Patch's disposal were 167 artillery weapons, including , , and
howitzer A howitzer () is a long- ranged weapon, falling between a cannon (also known as an artillery gun in the United States), which fires shells at flat trajectories, and a mortar, which fires at high angles of ascent and descent. Howitzers, like ot ...
s, and plentiful stocks of shells.


Operation


Preparation

On 1 January, the Japanese military changed their radio communication codes, making it more difficult for Allied
intelligence Intelligence has been defined in many ways: the capacity for abstraction, logic, understanding, self-awareness, learning, emotional knowledge, reasoning, planning, creativity, critical thinking, and problem-solving. More generally, it can b ...
, which had previously partially broken Japanese radio ciphers, to divine Japanese intentions and movement. As January progressed, Allied
reconnaissance In military operations, reconnaissance or scouting is the exploration of an area by military forces to obtain information about enemy forces, terrain, and other activities. Examples of reconnaissance include patrolling by troops (skirmisher ...
and radio traffic analysis noted the buildup of ships and aircraft at Truk, Rabaul, and the Shortland Islands. Allied analysts determined that the increased radio traffic in the Marshalls was a deception meant to divert attention from an operation about to take place in either New Guinea or the Solomons. Allied intelligence personnel misinterpreted the nature of the operation; on 26 January, the Allied Pacific Command's intelligence section informed Allied forces in the Pacific that the Japanese were preparing for a new offensive, called ''Ke'', in either the Solomons or New Guinea. On 14 January, an Express mission of nine destroyers delivered the Yano Battalion, designated as the rear guard for the ''Ke'' evacuation, to Guadalcanal. The battalion, commanded by Major Keiji Yano, consisted of 750 infantry and a battery of mountain guns crewed by another 100 men. Accompanying the battalion was Lieutenant Colonel
Kumao Imoto Kumao Imoto (井本熊男; 1903 in Yamaguchi Prefecture – 2000) was a Japanese military officer and a Lieutenant General of the Japan Ground Self-Defense Force. Life Imoto logged fatal experiments with cyanide gas as a weapon in 1942. He delivere ...
, representing the 8th Area Army, who was to deliver the evacuation order and plan to Hyakutake. The 17th Army had not yet been informed of the decision to withdraw. CAF and 13th Air Force air attacks on the nine destroyers during their return trip damaged destroyers and and destroyed eight Japanese fighters escorting the convoy. Five American aircraft were shot down. Late on 15 January, Imoto reached 17th Army's headquarters at Kokumbona and informed Hyakutake and his staff of the decision to withdraw from the island. Grudgingly accepting the order on the 16th, the 17th Army staff communicated the ''Ke'' evacuation plan to their forces on the 18th. The plan directed the 38th Division, which was currently defending against an American offensive on ridges and hills in the interior of the island, to disengage and withdraw towards Cape Esperance on the western end of Guadalcanal beginning on the 20th. The 38th's retirement would be covered by the 2nd Infantry Division, in place on Guadalcanal since October 1942, and the Yano Battalion, both of which would then follow the 38th westward. Any troops unable to move were encouraged to kill themselves to "uphold the honor of the Imperial Army".


Withdrawal westward

Patch initiated a new offensive just as the 38th Division began to withdraw from the inland ridges and hills that it had occupied. On 20 January, the 25th Infantry Division, under Major General J. Lawton Collins, attacked several hills, designated Hills 87, 88, and 89 by the Americans, that formed a ridge that dominated Kokumbona. Encountering much lighter resistance than anticipated, the Americans seized the three hills by the morning of 22 January. Shifting forces to exploit the unexpected breakthrough, Collins quickly continued the advance and captured the next two hills, 90 and 91, by nightfall, placing the Americans in position to isolate and capture Kokumbona and trap the Japanese 2nd Division. Reacting quickly to the situation, the Japanese hurriedly evacuated Kokumbona and ordered the 2nd Division to retire westward immediately. The Americans captured Kokumbona on 23 January. Although some Japanese units were trapped between the American forces and destroyed, most of the 2nd Division's survivors escaped. Still fearing a renewed and reinforced Japanese offensive, Patch committed the equivalent of only one regiment at a time to attack the Japanese forces west of Kokumbona, keeping the rest near Lunga Point to protect the airfield. The terrain west of Kokumbona favored the Japanese efforts to delay the Americans as the rest of the 17th Army continued its withdrawal towards Cape Esperance. The American advance was hemmed into a corridor only wide between the ocean and the thick, inland jungle and steep coral ridges. The ridges, running perpendicular to the coast, paralleled numerous streams and creeks that crossed the corridor with "washboard regularity." On 26 January, a combined US Army and Marine unit called the Composite Army-Marine (CAM) Division advancing westward encountered the Yano Battalion at the Marmura River. Yano's troops temporarily halted the CAM's advance and then slowly withdrew westward over the next three days. On 29 January, the Yano retreated across the Bonegi River, where soldiers from the 2nd Division had constructed another defensive position. The Japanese defenses at the Bonegi held up the American advance for almost three days. On 1 February, with help from a shore bombardment by the destroyers and , the Americans successfully crossed the river but did not immediately press the advance westward.


Air campaign

The ''Ke'' air superiority campaign began in mid-January with nightly harassment attacks on Henderson Field by 3–10 aircraft, causing little damage. On 20 January, a lone
Kawanishi H8K The Kawanishi H8K was a flying boat used by the Imperial Japanese Navy Air Service during World War II for maritime patrol duties. The Allied reporting name for the type was "Emily". The Kawanishi H8K was a large, four-engine aircraft designed ...
bombed
Espiritu Santo Naval Base Naval Advance Base Espiritu Santo or Naval Base Espiritu Santo, most often just called ''Espiritu Santo'', was a major advance Naval base that the U.S. Navy Seabees built during World War II to support the Allied effort in the Pacific. The base ...
. On 25 January, the IJN sent 58 Zero fighters on a daylight raid to Guadalcanal. In response, the CAF sent aloft eight
Wildcat The wildcat is a species complex comprising two small wild cat species: the European wildcat (''Felis silvestris'') and the African wildcat (''F. lybica''). The European wildcat inhabits forests in Europe, Anatolia and the Caucasus, while th ...
and six
P-38 The Lockheed P-38 Lightning is an American single-seat, twin piston-engined fighter aircraft that was used during World War II. Developed for the United States Army Air Corps by the Lockheed Corporation, the P-38 incorporated a distinctive twi ...
fighters, which shot down four Zeros without loss. A second large raid was conducted on 27 January by nine
Kawasaki Ki-48 The Kawasaki Ki-48 ( ja, 九九式雙發輕爆擊機, shiki-souhatu-keibaku, shortened to 'Sokei', Army Type 99 Twin-engined Light Bomber), was a Japanese twin-engine light bomber that was used during World War II. Its Allied reporting name was ...
"Lily" light bombers escorted by 74
Nakajima Ki-43 The Nakajima Ki-43 ''Hayabusa'' (, "Peregrine falcon", "Army Type 1 Fighter" ) is a single-engine land-based tactical fighter used by the Imperial Japanese Army Air Service in World War II. The Allied reporting name was "Oscar", but it was o ...
"Oscar" fighters from the IJA's 6th Air Division from Rabaul. Twelve Wildcats, six P-38s, and 10 P-40s from Henderson met the raid over Guadalcanal. In the resulting action, the Japanese lost six fighters while the CAF lost one Wildcat, four P-40s, and two P-38s. The "Lily"s dropped their bombs on American positions around the
Matanikau River The Matanikau River of Guadalcanal, Solomon Islands, is located in the northwest part of the island. During the World War II Guadalcanal campaign, several significant engagements occurred between United States and Japanese forces near the rive ...
, causing little damage.


Battle of Rennell Island

Believing that the Japanese were beginning a major offensive in the southern Solomons aimed at Henderson Field, Halsey responded by sending, beginning on 29 January, a resupply convoy to Guadalcanal supported by most of his warship forces, separated into five task forces. These five task forces included two fleet carriers, two escort carriers, three battleships, 12 cruisers, and 25 destroyers. Screening the approach of the transport convoy was Task Force 18 (TF 18), under Rear Admiral Robert C. Giffen, with three heavy and three light cruisers, two escort carriers, and eight destroyers. A fleet carrier task force, centered on the carrier ''Enterprise'', steamed about behind TF 18. In addition to protecting the supply convoy, TF 18 was charged with rendezvousing with a force of four U.S. destroyers, stationed at
Tulagi Tulagi, less commonly known as Tulaghi, is a small island——in Solomon Islands, just off the south coast of Ngella Sule. The town of the same name on the island (pop. 1,750) was the capital of the British Solomon Islands Protectorate from 18 ...
, at 21:00 on 29 January in order to conduct a sweep up "The Slot" north of Guadalcanal the next day to screen the unloading of the transports at Guadalcanal. As the escort carriers were too slow to allow Giffen's force to make the scheduled rendezvous, Giffen left the carriers behind with two destroyers at 14:00 on 29 January and steamed ahead. Giffen's force was being tracked by Japanese submarines, who reported on Giffen's location and movement to their naval headquarters units. Around mid-afternoon, based on the submarine's reports, 16 G4M from the 705 Air Group and 16
Mitsubishi G3M The was a Japanese bomber and transport aircraft used by the Imperial Japanese Navy Air Service (IJNAS) during World War II. The Yokosuka L3Y (Allied reporting name "Tina"), was a transport variant of the aircraft manufactured by the Yokosu ...
"Nell" bombers from the 701 Air Group took off from Rabaul carrying torpedoes to attack Giffen's force, now located between
Rennell Island Rennell Island, locally known as Mugaba, is the main island of two inhabited islands that make up the Rennell and Bellona Province in the nation state of Solomon Islands. Rennell Island has a land area of that is about long and wide. It is t ...
and Guadalcanal. The torpedo bombers attacked Giffen's ships in two waves between 19:00 and 20:00. Two torpedoes hit the heavy cruiser , causing heavy damage and bringing her to a dead stop. Three of the Japanese aircraft were shot down by anti-aircraft fire from Giffen's ships. In response, Halsey sent a tug to take ''Chicago'' under tow and ordered Giffen's task force to return to base the next day. Six destroyers were left behind to escort ''Chicago'' and the tugboat. At 16:00 on 30 January, a flight of 11 Mitsubishi torpedo bombers from the 751 Air Group, based at
Kavieng Kavieng is the capital of the Papua New Guinean province of New Ireland and the largest town on the island of the same name. The town is located at Balgai Bay, on the northern tip of the island. As of 2009, it had a population of 17,248. Kavi ...
and staging through Buka, attacked the force towing ''Chicago''. Fighter aircraft from ''Enterprise'' shot down eight of them, but most of the Japanese aircraft were able to release their torpedoes before crashing. One torpedo hit the destroyer , causing heavy damage. Four more torpedoes hit ''Chicago'', sinking her. The transport convoy reached Guadalcanal and successfully unloaded its cargo on 30–31 January. The rest of Halsey's warships took station in the Coral Sea south of the Solomons to wait for the approach of any Japanese warship forces supporting what the Allies believed to be an imminent offensive. The departure of TF 18 from the Guadalcanal area removed a significant potential threat to the ''Ke'' operation. At 18:30 on 29 January, two
corvette A corvette is a small warship. It is traditionally the smallest class of vessel considered to be a proper (or " rated") warship. The warship class above the corvette is that of the frigate, while the class below was historically that of the slo ...
s from the
Royal New Zealand Navy The Royal New Zealand Navy (RNZN; mi, Te Taua Moana o Aotearoa, , Sea Warriors of New Zealand) is the maritime arm of the New Zealand Defence Force. The fleet currently consists of nine ships. The Navy had its origins in the Naval Defence Act ...
, and , intercepted the Japanese submarine , which was attempting a supply run, off of Kamimbo on Guadalcanal. The two corvettes rammed and sank ''I-1'' after a 90-minute battle ().


First evacuation run

Leaving his cruisers at Kavieng, Mikawa gathered all 21 of his destroyers at the Japanese naval base in the Shortlands on 31 January to begin the evacuation runs. Rear Admiral Shintaro Hashimoto was placed in charge of this group of destroyers, titled the Reinforcement Unit. The "R" Area Air Force's 60 floatplanes were tasked with scouting for the Reinforcement Unit and helping defend against Allied PT boat attacks during the nighttime evacuation runs. Allied B-17 bombers attacked the Shortlands anchorage on the morning of 1 February, causing no damage and losing four aircraft to Japanese fighters. This same day, the IJA's 6th Air Division raided Henderson Field with 23 "Oscar"s and six "Lily"s but caused no damage and suffered the loss of one fighter. Believing that the Japanese might be retreating to the south coast of Guadalcanal, on the morning of 1 February Patch landed a reinforced battalion of army and Marine troops, about 1,500 men under the command of Colonel Alexander George, at Verahue on Guadalcanal's south coast. The U.S. troops were delivered to the landing location by a naval transport force of six
landing craft tank The Landing Craft, Tank (LCT) (or Tank Landing Craft TLC) was an amphibious assault craft for landing tanks on beachheads. They were initially developed by the Royal Navy and later by the United States Navy during World War II in a series of ver ...
s and one transport destroyer (), escorted by four other destroyers (the same destroyers that were to have joined TF 18 three days earlier). A Japanese reconnaissance aircraft spotted the naval landing force. Believing that the force posed a threat to that night's scheduled evacuation run, an airstrike of 13
Aichi D3A The Aichi D3A Type 99 Carrier Bomber ( Allied reporting name "Val") is a World War II carrier-borne dive bomber. It was the primary dive bomber of the Imperial Japanese Navy (IJN) and was involved in almost all IJN actions, including the a ...
2 "Val"
dive bomber 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 througho ...
s escorted by 40 Zeros departed Buin, Bougainville to attack the ships. Mistaking the Japanese strike aircraft as friendly, the U.S. destroyers withheld fire until the "Val"s began their attack. Beginning at 14:53, destroyer was rapidly hit by three bombs and sank almost immediately south of Savo Island with the loss of 167 of her crew, including her captain. Destroyer was damaged by several near-misses. Five "Val"s and three Zeros were lost to anti-aircraft fire and CAF fighters. The CAF lost three Wildcats in the engagement. Hashimoto departed the Shortlands at 11:30 on 1 February with 20 destroyers for the first evacuation run. Eleven destroyers were designated as transports screened by the other nine. The destroyers were attacked in the late afternoon near
Vangunu Vangunu is an island, part of the New Georgia Islands in the Solomon Islands. It is located between New Georgia and Nggatokae Island. To the north and east of the island is Marovo Lagoon. The island has an area of . There are a small number of ...
by 92 CAF aircraft in two waves. , Hashimoto's flagship, was heavily damaged by a near miss. Four CAF aircraft were shot down. Hashimoto transferred to and detached to tow ''Makinami'' back to base. Eleven U.S. PT boats awaited Hashimoto's destroyers between Guadalcanal and
Savo Island Savo Island is an island in Solomon Islands in the southwest South Pacific ocean. Administratively, Savo Island is a part of the Central Province of the Solomon Islands. It is about from the capital Honiara. The principal village is Alialia, i ...
. Beginning at 22:45, Hashimoto's warships and the PT boats engaged in a series of running battles over the next three hours. Hashimoto's destroyers, with help from "R" Area aircraft, sank three of the PT boats. In the meantime, the transport destroyers arrived off of two pick-up locations at Cape Esperance and Kamimbo at 22:40 and 24:00 respectively. Japanese naval personnel ferried the waiting troops out to the destroyers in barges and landing craft. Rear Admiral Tomiji Koyanagi, second-in-command of the Reinforcement Unit, described the evacuees: "They wore only the remains of clothes that were so soiled their physical deterioration was extreme. Probably they were happy but they showed no expression. Their digestive organs were so completely destroyed, we couldn't give them good food, only porridge." Another officer added that, "Their buttocks were so emaciated that their anuses were completely exposed, and on the destroyers that picked them up they suffered from constant and uncontrolled diarrhea." After embarking 4,935 soldiers, mainly from the 38th Division, the transport destroyers ceased loading at 01:58 and prepared to depart for the return trip to the Shortlands. About this time, , one of the screening destroyers, was suddenly wracked by a large explosion, caused by either a PT boat torpedo or a
naval mine A naval mine is a self-contained explosive device placed in water to damage or destroy surface ships or submarines. Unlike depth charges, mines are deposited and left to wait until they are triggered by the approach of, or contact with, any ...
. Informed that ''Makigumo'' was immobilized, Hashimoto ordered her abandoned and scuttled (). During the return trip, the Reinforcement Unit was attacked by CAF aircraft at 08:00, but sustained no damage and arrived at the Shortlands without further incident at 12:00 on 2 February.


Second and third evacuation runs

On 4 February, Patch ordered the 161st Infantry Regiment to replace the 147th at the front and resume the advance westward. The Yano battalion retreated to new positions at the Segilau River and troops were sent to block the advance of George's force along the south coast. Meanwhile, Halsey's carrier and battleship task forces remained just beyond Japanese air attack range about south of Guadalcanal. Kondō sent two of his force's destroyers, and , to the Shortlands to replace the two destroyers lost in the first evacuation run. Hashimoto led the second evacuation mission with 20 destroyers south toward Guadalcanal at 11:30 on 4 February. The CAF attacked Hashimoto in two waves beginning at 15:50 with a total of 74 aircraft. Bomb near-misses heavily damaged , and Hashimoto detached to tow her back to Shortland. The CAF lost 11 aircraft in the attack while the Japanese lost one Zero. The U.S. PT boats did not sortie to attack Hashimoto's force this night and the loading went uneventfully. The Reinforcement Force embarked Hyakutake, his staff, and 3,921 men, mainly from the 2nd Division, and reached Bougainville without incident by 12:50 on 5 February. A CAF airstrike launched that morning failed to locate Hashimoto's force. Believing that the Japanese operations on 1 and 4 February had been reinforcement, not evacuation missions, the American forces on Guadalcanal proceeded slowly and cautiously, advancing only about each day. George's force halted on 6 February after advancing to Titi on the south coast. On the north coast, the 161st finally began their attack westward at 10:00 on 6 February and reached the Umasani River the same day. At the same time, the Japanese were withdrawing their remaining 2,000 troops to Kamimbo. On 7 February, the 161st crossed the Umasani and reached Bunina, about from Cape Esperance. George's force, now commanded by George F. Ferry, advanced from Titi to Marovovo and dug in for the night about north of the village. Aware of the presence of Halsey's carriers and other large warships near Guadalcanal, the Japanese considered canceling the third evacuation run, but decided to go ahead as planned. Kondō's force closed to within of Guadalcanal from the north to be ready in case Halsey's warships attempted to intervene. Hashimoto departed the Shortlands with 18 destroyers midday of 7 February, this time taking a course south of the Solomons instead of down the Slot. A CAF strike force of 36 aircraft attacked Hashimoto at 17:55, heavily damaging with a bomb near miss. ''Isokaze'' retired escorted by ''Kawakaze''. The Allies and the Japanese each lost one aircraft in the attack. Arriving off Kamimbo, Hashimoto's force loaded 1,972 soldiers by 00:03 on 8 February, unhindered by the U.S. Navy. For an additional 90 minutes, destroyer crewmen rowed their boats along the shore calling out again and again to make sure no one was left behind. At 01:32, the Reinforcement Group left Guadalcanal in its wake and reached Bougainville without incident at 10:00, completing the operation.


Aftermath

At dawn on 8 February, the U.S. Army forces on both coasts resumed their advances, encountering only a few sick and dying Japanese soldiers. Patch now realized that the Tokyo Express runs over the last week were evacuation, not reinforcement missions. At 16:50 on 9 February, the two American forces met on the west coast at the village of Tenaro. Patch sent a message to Halsey stating, "Total and complete defeat of Japanese forces on Guadalcanal effected 16:25 today...the Tokyo Express no longer has a terminus on Guadalcanal." The Japanese had successfully evacuated a total of 10,652 men from Guadalcanal, about all that remained of the 36,000 total troops sent to the island during the campaign. Six hundred of the evacuees succumbed to their injuries or illnesses before they could receive sufficient medical care. Three thousand more required lengthy hospitalization or recuperation. After receiving word of the completion of the operation, Yamamoto commended all the units involved and ordered Kondō to return to Truk with his warships. The 2nd and 38th Divisions were shipped to Rabaul and partially reconstituted with replacements. The 2nd Division was relocated to the
Philippines The Philippines (; fil, Pilipinas, links=no), officially the Republic of the Philippines ( fil, Republika ng Pilipinas, links=no), * bik, Republika kan Filipinas * ceb, Republika sa Pilipinas * cbk, República de Filipinas * hil, Republ ...
in March 1943 while the 38th was assigned to defend Rabaul and New Ireland. The
8th Area Army The was a field army of the Imperial Japanese Army during World War II. History The Japanese 8th Area Army was formed on November 16, 1942 under the Southern Expeditionary Army Group for the specific task of opposing landings by Allied forces i ...
and Southeast Area Fleet reoriented their forces to defend the central Solomons at
Kolombangara Kolombangara (sometimes spelled ''Kulambangara'') is an island in the New Georgia Islands group of the nation state of Solomon Islands in the southwestern Pacific Ocean. The name is from a local language, a rough translation of its meaning is ...
and
New Georgia New Georgia, with an area of , is the largest of the islands in Western Province, Solomon Islands, and the 200th-largest island in the world. Geography New Georgia island is located in the New Georgia Group, an archipelago including most ...
and prepared to send the reinforcements, mainly consisting of the 51st Infantry Division, originally detailed for Guadalcanal to New Guinea. The 17th Army was rebuilt around the
6th Infantry Division 6th Division may refer to: Infantry divisions * 6th Division (Australia) * 6th Division (Austria) *6th (United Kingdom) Division * Finnish 6th Division (Winter War) *Finnish 6th Division (Continuation War) * 6th Division (Reichswehr) * 6th Divisi ...
and headquartered on Bougainville. A few Japanese stragglers remained on Guadalcanal, many of whom were killed or captured by Allied patrols. The last known
Japanese holdout Japanese holdouts ( ja, 残留日本兵, translit=Zanryū nipponhei, lit=remaining Japanese soldiers) were soldiers of the Imperial Japanese Army and Imperial Japanese Navy during the Pacific Theatre of World War II who continued fighting World Wa ...
surrendered in October 1947. In hindsight, historians have faulted the Americans, especially Patch and Halsey, for not taking advantage of their ground, aerial, and naval superiority to prevent the successful Japanese evacuation of most of their surviving forces from Guadalcanal. Said
Chester Nimitz Chester William Nimitz (; February 24, 1885 – February 20, 1966) was a fleet admiral in the United States Navy. He played a major role in the naval history of World War II as Commander in Chief, US Pacific Fleet, and Commander in C ...
, commander of Allied forces in the Pacific, of the success of Operation Ke, "Until the last moment it appeared that the Japanese were attempting a major reinforcement effort. Only the skill in keeping their plans disguised and bold celerity in carrying them out enabled the Japanese to withdraw the remnants of the Guadalcanal garrison. Not until all organized forces had been evacuated on 8 February did we realize the purpose of their air and naval dispositions." Nevertheless, the successful campaign to recapture Guadalcanal from the Japanese was an important strategic victory for the U.S. and its allies. Building on their success at Guadalcanal and elsewhere, the Allies continued their campaign against Japan, ultimately culminating in Japan's defeat and the end of World .Frank, p. 597; Rottman, p. 64; Miller, pp. 348–350.


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* * * * * {{DEFAULTSORT:Ke, Operation 1943 in Japan 1943 in the Solomon Islands Battles and operations of World War II involving the Solomon Islands Battles of World War II involving Japan Battles of World War II involving the United States Conflicts in 1943 Evacuations February 1943 events Guadalcanal Campaign January 1943 events Military history of Japan during World War II Pacific Ocean theatre of World War II