World War 2 Timeline - Pacific Japan Invades Manchuria Manhattan Project Initiated Tripartitie Pact Signed Hideki Tojo becomes Japan's Prime Minister Pearl Harbor Attacks across East Asia by Japan Doolittle Raids Battle of the Coral Sea Battle of Midway Guadalcanal Campaign Begins Battle of Tarawa Battle of Leyte Battle of Iwo Jima Battle of Okinawa Begins Truman Takes Office The Trinity Test 1st Atomic Bomb attack on Japan Japan Surrenders