How was America involved with Japan in WW2 and why? Before the war started the U.S. and Japan had conflicts which lead to Japan's surprising attack on Pearl Harbor. After Pearl Harbor, the U.S. battled the Japanese in the unpleasant conditions of the pacific islands. When the U.S. made the decision to use a strategy that had never been used before, it produced fatal results and ended the war. This dire war between the U.S. and Japan could have been prevented.

Initially, Japan battled the U.S. for many reasons. Before Japan entered WW2 it's economy was already weak. In 1923 the Great Kanto Earthquake took 140,000 lives and destroyed Tokyo and Yokohama. The great depression of 1929 also weakened the economy . In WW1 Japan had joined the allied powers but wasn't supported by the U.S. and even was discriminated against. The Japanese attained greater malice...