The was an amphibious

army 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 ...

of 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 ...

formed on September 7, 1940 to coordinate the invasion and occupation of

French Indochina French Indochina (previously spelled as French Indo-China),; vi, Đông Dương thuộc Pháp, , lit. 'East Ocean under French Control; km, ឥណ្ឌូចិនបារាំង, ; th, อินโดจีนฝรั่งเศส, ...

during the

Second Sino-Japanese War The Second Sino-Japanese War (1937–1945) or War of Resistance (Chinese term) was a military conflict that was primarily waged between the Republic of China and the Empire of Japan. The war made up the Chinese theater of the wider Pacific Th ...

. It was supported by a contingent from 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 5th Fleet The was a fleet of the Imperial Japanese Navy, active during the early portions of the Second Sino-Japanese War, and again in World War II, primarily in the Aleutian campaign, during which it was augmented and designated the Northern Area Force. ...

and naval aircraft from the aircraft carrier ''Hiryū'' and air bases on

Hainan Hainan (, ; ) is the smallest and southernmost province of the People's Republic of China (PRC), consisting of various islands in the South China Sea. , the largest and most populous island in China,The island of Taiwan, which is slightly l ...

Island.

History

Imperial General Headquarters The was part of the Supreme War Council and was established in 1893 to coordinate efforts between the Imperial Japanese Army and Imperial Japanese Navy during wartime. In terms of function, it was approximately equivalent to the United States ...

deemed that control of

Vichy Vichy (, ; ; oc, Vichèi, link=no, ) is a city in the Allier Departments of France, department in the Auvergne-Rhône-Alpes region of central France, in the historic province of Bourbonnais. It is a Spa town, spa and resort town and in World ...

-controlled

would make the Japanese

blockade A blockade is the act of actively preventing a country or region from receiving or sending out food, supplies, weapons, or communications, and sometimes people, by military force. A blockade differs from an embargo or sanction, which are le ...

of China much more effective and would hasten the collapse of the

Kuomintang The Kuomintang (KMT), also referred to as the Guomindang (GMD), the Nationalist Party of China (NPC) or the Chinese Nationalist Party (CNP), is a major political party in the Republic of China, initially on the Chinese mainland and in Tai ...

government of

China China, officially the People's Republic of China (PRC), is a country in East Asia. It is the world's most populous country, with a population exceeding 1.4 billion, slightly ahead of India. China spans the equivalent of five time zones and ...

. Japan began pressuring the Vichy government to close the railway between

Haiphong Haiphong ( vi, Hải Phòng, ), or Hải Phòng, is a major industrial city and the third-largest in Vietnam. Hai Phong is also the center of technology, economy, culture, medicine, education, science and trade in the Red River delta. Haiphong wa ...

and Yunnan on September 5, the

Southern Expeditionary Army Group ''Nanpō gun'' , image = 1938 terauchi hisaichi.jpg , image_size = 200px , caption = Japanese General Count Terauchi Hisaichi, right, commanding officer of the Southern Expeditiona ...

organized the amphibious Indochina Expeditionary Army under its command to coordinate a joint operation with the Japanese 5th Infantry Division of the

Japanese Southern China Area Army The was a field army of the Imperial Japanese Army during Second Sino-Japanese War. History The Japanese South China Area Army was formed on February 9, 1940 under the control of the China Expeditionary Army. It was transferred to direct contro ...

. On September 22, Japan and Vichy Indochina signed an accord which granted basing and transit rights, but limited the number of Japanese troops which could be stationed in Indochina to 6,000, and limited the total number of troops that could be in the colony at any given time to 25,000. Within a few hours of the agreement, the 5th Division crossed the border at three places, closed in on the railhead, and the Battle of Lang Son ensued. Vichy France protested the breach of the agreement on September 23, but the Indochina Expeditionary Army, supported by the Imperial Japanese Navy, began sorties on the following morning on

in the

Gulf of Tonkin The Gulf of Tonkin is a gulf at the northwestern portion of the South China Sea, located off the coasts of Tonkin (northern Vietnam) and South China. It has a total surface area of . It is defined in the west and northwest by the northern ...

. Japanese forces landed on September 26, and captured the city of

Hanoi Hanoi or Ha Noi ( or ; vi, Hà Nội ) is the capital and second-largest city of Vietnam. It covers an area of . It consists of 12 urban districts, one district-leveled town and 17 rural districts. Located within the Red River Delta, Hanoi is ...

by evening. After the operation was completed, the Indochina Expeditionary Army was officially disbanded on July 5, 1941.

Commanders

Literature

* Hsu Long-hsuen and Chang Ming-kai, ''History of The Sino-Japanese War (1937–1945)'' 2nd Ed., 1971. Translated by Wen Ha-hsiung, Chung Wu Publishing; 33, 140th Lane, Tung-hwa Street, Taipei, Taiwan Republic of China. Pg. 317 * * *

External links

*{{cite web , last = Wendel , first = Marcus , url = http://www.axishistory.com/index.php?id=7708 , title = Axis History Factbook , work = Indochina Expeditionary Army
Vichy Indo-China vs Japan, 1940
Japanese armies Military units and formations established in 1940 Military units and formations disestablished in 1941

History

See also

Commanders

Literature

External links