Events leading to the attack on Pearl Harbor

A series of events led to the attack on Pearl Harbor. War between Japan and the United States had been a possibility that each nation's military forces planned for in the 1920s. The expansion of American territories in the Pacific had been a threat to Japan since the 1890s, though the real tension did not begin until the rejection of Japan’s Racial Equality Proposal and the 1931 invasion of Manchuria by Japan.

Events leading to the attack on Pearl Harbor

A series of events led to the attack on Pearl Harbor. War between Japan and the United States had been a possibility that each nation's military forces planned for in the 1920s. The expansion of American territories in the Pacific had been a threat to Japan since the 1890s, though the real tension did not begin until the rejection of Japan’s Racial Equality Proposal and the 1931 invasion of Manchuria by Japan.