This book is about the attack on Pearl Harbor, which was a surprise military strike by the Imperial Japanese Navy Air Service upon the United States against the naval base at Pearl Harbor in Honolulu, Territory of Hawaii, just before 8:00 a.m., on Sunday, December 7, 1941. The United States was a neutral country at the time; the attack led to its formal entry into World War II the next day.In this book the authors have consulted primary materials in the Marine Corps Historical Center Reference Section (November/December 1941 muster rolls) and Personal Papers Section (Claude A. Larkins, Roger M. Emmons, and Wayne Jordan collections), as well as in the Naval Historical Center Operational Archives Branch (action reports and/or microfilmed deck logs for the 15 ships with embarked Marine Detachments, and those units included in the Commandant, 14th Naval District, report), in the office of the Coast Guard Historian, and in the Gordon W. Prange Papers.