Timeline - Hirohito's War
| 1930 | January, June, November |
| 1931 | September |
| 1932 | May, October |
| 1933 | January - March |
| 1934 | July - October |
| 1935 | January - September |
| 1936 | February - December |
| 1937 | June - December |
| 1938 | January - November |
| 1939 | March - December |
| 1940 | March - December |
| 1941 | March - November |
| December | |
| 1942 | January |
| February | |
| March | |
| April - June | |
| July - September | |
| October - December | |
| 1943 | January - March |
| April - June | |
| July - September | |
| October - December | |
| 1944 | January - March |
| April - June | |
| July - September | |
| October - December | |
| 1945 | January - March |
| April - June | |
| July - October | |
PACIFIC WAR TIMELINE
DECEMBER 1941
1 December: Japan: The Emperor and Japan’s military leaders interpret the Hull note as giving them no option but to make the final decision to go to war with America.
5 December: Russia: German army halted in front of Moscow and the Soviet Army counterattacks.
7 December: Hawaii. Japanese carriers attack Pearl Harbor.
The Philippines: General Homma bombs the Philippines and destroys US Airforce on Luzon.
Malaya: General Yamashita invades Thailand and Northern Malaya.
8 December: US, Great Britain and Holland declare war on Japan.
10 December: The Philippines: General Homma invades the Philippines.
11 December: Germany: Hitler declares war on the United States.
11 December: Malaya: Battle of Jitra: General Percival first stand in northern Malaya.
Guam: Japanese forces occupy Guam.
Malaya: Naval Battle of Malaya: HMS Prince of Wales and HMS repulse are sunk off Malayan coast.
Wake Island: Japanese forces occupy Wake Island (a US Pacific territory)
16 December: Borneo: Japanese invade Borneo.
17 December: Malaya: British residents abandon Penang Island (northeast Malaya).
18 December: China: Japanese invade Hong Kong.
21 December: The Philippines: Homma’s main landing on Luzon at Lingayen Gulf to the North West of Manila.
22 December: America: ARCADIA Conference (First Washington Conference) begins with Prime Minister Churchill and President Roosevelt and their respective military staffs.
23 December: The Philippines: General MacArthur withdraws his army to the Bataan Peninsula and himself to Corregidor Island at the entrance of Manila Bay.
24 December: The Philippines: Japanese forces land on Luzon 30 miles to the southeast of Manila.
25 December: China: British surrender in Hong Kong.
Burma: The Flying Tigers (American Volunteer Group: AVG) shoot down 10 Japanese aircraft over Burma.
27 December: The Philippines: Manila is bombed.