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Japanese occupation of Guam

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Japanese occupation of Guam

Japanese occupation of Guam
Date 11 December 1941 – 10 August 1944
Location Guam
Participants Empire of Japan
Outcome Ended 10 August 1944

The Japanese occupation of Guam was the period in the history of Guam between 1941 and 1944 when Imperial Japanese forces occupied Guam during World War II. The island was renamed Ōmiya-Jima (Great Shrine Island).

Overview of Guam

Guam is located 12 degrees, 75 minutes, north latitude, and 144 degrees, 47 minutes east longitude. Guam is the southern most island in the Marianas Island Chain. It is part of an underwater mountain range and is the largest of over 2,000 islands between Hawaii and the Philippines. The native people of Guam are known as "Chamorros".

Events leading to the occupation

The [1]

Life during the occupation

During the occupation period, Chamorros were forced to endure the hardships of the military occupation in a war not caused by them. For the first four months, the island was controlled by army troops, who were housed in schools and government buildings in Agana. Chamorros were required to learn the Japanese custom of bowing, Japanese yen became the island’s currency, and civilian affairs were handled by a branch of the army called the minseisho. Cars, radios, and cameras were confiscated and food was rationed until supplies became exhausted.

Control of the island came under the Imperial Japanese Navy in March 1942. The keibitai, as it was known, governed the populace for about 19 months. Chamorros were allowed to remain on their farms and trade for products they needed. Social activities including parties, Japanese movies, and sports competitions were allowed. Mass meetings were held in Agana to reinforce the "Nippon Seishin" (spirit of Japan). Schools were reopened and Chamorros were required to learn the Japanese language and customs. English was forbidden. Adults and children were taught reading, writing, math, and Japanese games and songs.

Events leading to end of the occupation

In early 1944, the war was going badly for Japan. With an American invasion threatening, the Japanese Army returned to Guam, bringing with it a new stricter form of government- the kaikontai. Social activities were terminated, schools were closed, and Chamorro men, women, and children over the age of 12 were forced to work long hours in the fields, repair or build airstrips and defense installations, and dig hundreds of Japanese cave shelters, many of which are within the boundaries of War in the Pacific National Historical Park on Guam. Chamorros, laboring at bayonet point, were mistreated and, in some cases, executed after completing defense installations. Without warning, 10,000–15,000 Chamorros of all age were forced to march with only the belongings they could carry to camps in Guam’s central and southern jungles. With inadequate shelter, little food, and no sanitary facilities, life in these camps was miserable. Despite hardships, however, incarceration proved to be a blessing in disguise. Had they not been moved, many Chamorros would have been killed by the American misallocation of bombs and Japanese cross fire.

End of the occupation

On 21 July, the Americans landed on both sides of the Orote peninsula. On the western side of Guam, the Americans endeavored to cut off the airfield. The 3rd Marine Division landed near Agana to the north of Orote at 08:28, and the 1st Provisional Marine Brigade landed near Agat to the south. Japanese artillery sank 20 LVTs, but by 09:00 tanks were ashore at both beaches. The 77th Infantry Division had a more difficult landing. Lacking amphibious vehicles, they had to wade ashore from the edge of the reef where they were dropped by their landing craft.

By nightfall, the Americans had established beachheads about 2,000 meters deep. Japanese counter-attacks were made throughout the first few days of the battle, mostly at night, using infiltration tactics. Several times they penetrated the American defenses and were driven back with heavy loss of men and equipment. Lieutenant General Takeshi Takashima was killed on 28 July, and Lieutenant General Hideyoshi Obata took over the command of the defenders.

Supply was very difficult for the Americans in the first days of the battle. Landing ships could not come closer than the reef, several hundred meters from the beach and amphibious vehicles were scarce. However, the two beachheads were joined up on 28 July, and the Orote airfield and Apra Harbor were captured by 30 July.

The counterattacks around the American beachheads had exhausted the Japanese. At the start of August they were running out of food and ammunition and had only a handful of tanks left. Obata withdrew his troops from the south of Guam, planning to make a stand in the mountainous central part of the island. But with resupply and reinforcement impossible because of American control of the sea and air around Guam, he could hope to do no more than delay the inevitable defeat for a few days.

Rain and thick jungle made conditions difficult for the Americans, but after an engagement at Mount Barrigada from 2 August to 4 August, the Japanese line collapsed and the rest of the battle was a pursuit to the north. As in other battles of the Pacific War, the Japanese refused to surrender, and almost all were killed.

On 10 August 1944, the American forces defeated the last Japanese troops on Guam, ending the occupation.

Life today

As a result of the end of the Japanese occupation, Guam celebrates with a yearly Liberation Day on 21 July. The island also holds a procession on 8 December, this also commemorates the day of the Japanese attack. On this day, people gather in Hagatna and watch parades and have carnivals.

Monuments and historical markers in Guam relating to the occupation

See also


  1. ^

External links

  • WAPA – The Occupation of Guam
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