Aircraft Carrier HMS Hermes (95) sinking during the Indian Ocean raid
Date
1940 - 15 August 1945
Location
Indian Ocean and its surroundings
Result
Allied victory
Belligerents
Allies British Empire
United Kingdom
India
Burma
Ceylon
Aden
Bahrain
Iraq
Kuwait
Qatar
Trucial States
Abu Dhabi
Dubai
Kenya
Somaliland
Tanganyika
Australia Netherlands Free France United States New Zealand
Axis Japan Germany Italy
Vichy France
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t
e
Campaigns of World War II
Europe
Poland
Phoney War
Finland
Winter War
Karelia
Lapland
Denmark and Norway
Western Front
1940
1944–1945
Britain
Balkans
Eastern Front
Italy
Sicily
Asia-Pacific
China
Pacific Ocean
South West Pacific
Franco-Thai War
South-East Asia
Burma and India
Japan
Manchuria and Northern Korea
pre-war border conflicts
Mediterranean and Middle East
Africa
North Africa
East Africa
Mediterranean Sea
Adriatic
Malta
Middle East
Iraq
Syria–Lebanon
Iran
Southern France
Other campaigns
Americas
Atlantic
Arctic
Strategic bombing
French West Africa
Indian Ocean
Madagascar
Coups
Yugoslavia
Iraq
Italy
Romania
Bulgaria
Hungary
French Indochina
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t
e
Pacific War
Central Pacific
Pearl Harbor
Marshalls–Gilberts raids
K
Doolittle Raid
Midway
Gilberts and Marshalls
Marianas and Palau
Volcano and Ryukyu
Truk
Ocean Island
Indian Ocean (1941–1945)
Japanese merchant raids
Andaman Islands
Homfreyganj massacre
Christmas Island
1st Indian Ocean
Ceylon
Bay of Bengal
2nd Indian Ocean
Southeast Asia
Indochina (1940)
Franco-Thai War
Thailand
Malaya
Hong Kong
Singapore
Indochina (1945)
Malacca Strait
Jurist
Tiderace
Zipper
Strategic bombing (1944–45)
Burma and India
Burma (1941–42)
Burma (1942–43)
Burma and India (1944)
Burma (1944–45)
Southwest Pacific
Dutch East Indies (1941–42)
Philippines (1941–42)
RY
Solomon Islands
Coral Sea
Timor
Australia
New Guinea
New Britain
Philippines (1944–45)
Borneo (1945)
North America
Ellwood
Aleutian Islands
Estevan Point Lighthouse
Fort Stevens
Lookout Air Raids
Fire balloon bombs
Project Hula
PX
Japan
Air raids
Tokyo
Yokosuka
Kure
Hiroshima and Nagasaki
Mariana Islands
Volcano and Ryukyu Islands
Starvation
Naval bombardments
Sagami Bay
South Sakhalin
Kuril Islands
Shumshu
Downfall
Japanese surrender
Manchuria and Northern Korea
Kantokuen
Manchuria (1945)
Mutanchiang
Chongjin
Second Sino-Japanese War
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Indian Ocean Theatre
27 February 1941
8 May 1941
Sydney and Kormoran
Japanese merchant raiders
Andaman Islands
Homfreyganj massacre
Christmas Island
1st Indian Ocean
Ceylon
Cocos Islands
Madagascar
Stab
Réunion
Goa
Monsun Gruppe
13 November 1943
11 January 1944
14 February 1944
2nd Indian Ocean
17 July 1944
Prior to World War II, the Indian Ocean was an important maritime trade route between European nations and their colonial territories in East Africa, the Arabian Peninsula, British India, Indochina, the East Indies (Indonesia), and Australia for a long time. Naval presence was dominated by the Royal Navy Eastern Fleet and the Royal Australian Navy as World War II began, with a major portion of the Royal Netherlands Navy operating in the Dutch East Indies and the Red Sea Flotilla of the Italian Regia Marina operating from Massawa.
Axis naval forces gave a high priority to disrupting Allied trade in the Indian Ocean. Initial anti-shipping measures of unrestricted submarine warfare and covert raiding ships expanded to include airstrikes by aircraft carriers and raids by cruisers of the Imperial Japanese Navy. A KriegsmarineMonsun Gruppe of U-boats operated from the eastern Indian Ocean after the Persian Corridor became an important military supply route to the Soviet Union.
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