Japan
In 1941, Japan attacked Pearl Harbor in Hawaii, a water base of the United States, and destroyed or damaged many ships and airplanes. This started the United States' involvement in World War II. American and Japanese forces fought each other in the Pacific. Once airbases were established within range of the Japanese mainland, America began to win, and started dropping bombs on Japanese cities. America was able to bomb most of the important cities and quickly brought Japan close to defeat.