Why did the the Japanese attacked Pearl By vitali14 Jun 28, 1914 World War 1 began Period: Jun 28, 1914 to Jan 1, 1980 Bombing of Pearl Harbor Mar 21, 1918 World War 1 ended Dec 7, 1941 Japan lead a surprise attack on Pearl Harbor Dec 7, 1941 The United States sended 5 battleships the Arizona, the Oklahoma,the Navada,the California, and the West Virginia, Dec 7, 1941 Then Japan attacked the 5 ships.Some of them sank, some of them didn't sink but weren't funcinal but some survive Dec 7, 1941 After that distored the ships they distored Pearl Harbor Dec 8, 1941 President Franklin D Roosevelt calling December 7"A date which will live in infamy" Mar 31, 1945 World War 2 ended May 30, 1962 Pearl Harbor memorial