1931 |
| September 18: | Japan invades Manchuria, China |
1939 |
| September 1: | Germany invades Poland |
| September 3: | Britain, France, Australia and New Zealand declare war on Germany |
1941 |
| December 7: | Japan attacks Pearl Harbor |
| December 8: | USA and Britain declare war on Japan |
| December 11: | Germany and Italy declare war on USA |
| December 25: | Japanese troops capture Hong Kong |
1942 |
| January 2: | Japanese troops capture Manila, Philippines |
| January 8: | Australian aircraft photograph Truk Lagoon |
| January 15: | Australian aircraft bombs Truk Lagoon |
| January 23: | Japanese troops take Rabaul |
| January 25: | Japanese troops land on the Solomon Islands |
| February 1: | USA aircraft bomb Japanese bases in Marshall and Gilbert Islands |
| February 15: | Japanese troops capture Singapore |
| May 4: | Japanese troops land on Corregidor, Philippines |
| May 8: | Battle of the Coral Sea ends. Japan loses aircraft carrier
Shoho and USA loses USS Lexington |
| June 7: | Battle of Midway ends. One USA aircraft carrier (USS Yorktown)
and four Japanese (Akagi, Kaga, Soryu and Hiryu)
aircraft carriers sunk |
| July 3: | Japanese troops land at Guadalcanal |
| September 26: | Australians repel Japanese troops near Port Moresby, New Guinea |
1943 |
| January 1-31: | USA decodes Japanese radio traffic out of Truk Lagoon |
| February 9: | Japanese surrender Guadalcanal |
| April 18: | Admiral Yamamoto, Commander in Chief of the Japanese Combined Fleet killed |
| November 1: | USA invades Bougainville in the Solomon Islands |
1944 |
| January 31: | Majuro Atoll, Marshall Islands occupied by USA troops |
| February 17&18: | Operation Hailstone, first bombing of Truk Lagoon by USA Carrier Fleet |
| February 20: | Japanese base at Rabaul destroyed by USA Carrier Fleet |
| March 23—April 6: | USA raids on Yap, Palau and Woleai |
| April 30—May 1: | Second USA Carrier Fleet raid on Truk Lagoon |
| June 6: | D-Day. The allies land in Normandy |
| July 21: | American troops land on Guam. |
| September 11: | Allied troops enter Germany |
| October 26: | Battle of Leyte Gulf in the Philippines won by USA |
| November 10: | Japanese troops capture Liuzhou, China |
1945 |
| January 9: | American troops land in the Philippines. |
| February 19: | American troops land on Iwo Jima. |
| May 7: | Unconditional surrender of German forces. |
| June 14: | British Carrier Fleet raid on Truk Lagoon |
| July 16: | USA test the first atomic bomb |
| July 22: | American troops capture Okinawa |
| August 6: | Atomic bomb is dropped on Hiroshima, Japan |
| August 9: | Atomic bomb is dropped on Nagasaki, Japan. |
| August 14: | Japan surrenders |
| September 2: | Japanese forces in Truk Lagoon surrender aboard USS Portland |
| October 24: | United Nations is officially born |
