Final answer:
The major goal of the US occupation of Japan after WWII was to destroy militarism in Japan through demilitarization and democratic reforms.
Step-by-step explanation:
The major goal of the US occupation of Japan after WWII was to destroy militarism in Japan. This was done through a process of demilitarization, which involved dismantling Japan's armed forces, disarming its military industry, and eliminating expressions of patriotism from its schools and public life. Additionally, the occupation authorities promoted democratic reforms, such as giving women the right to vote and establishing other democratic institutions, in order to create a stable and peaceful Japan. The occupation lasted for seven years and was considered a success in terms of achieving its goals.