Pacific War By facebooker_1769285056705078 Dec 7, 1941 Japanese bomb Pearl Harbor Dec 8, 1941 U.S. and Britian declare war on Japan Dec 15, 1941 First Japanese merchant ship sunk by a U.S. submarine. Dec 25, 1941 British surrender at Hong Kong. 1942 Japanese take Singapore Jun 7, 1942 Battle of Midway Japanese brutally defeated by U.S. Period: Aug 7, 1942 to Feb 9, 1943 The Battle of Guadalcanal Period: Feb 19, 1945 to Mar 26, 1945 Battle of Iwo Jima Period: Aug 6, 1945 to Aug 9, 1945 Bombing of Hiroshima and Nagasaki Aug 15, 1945 Emperor Hirohito announces surrender of Japan