Answer:
focusing on Germany and Italy first and then combining forces to defeat Japan
Step-by-step explanation:
The allies first fought and defeated Italy, and around the same time that they defeated Italy, they were close to defeating Germany.
During all this time, only the United States continued to face Japan on the Pacific, essentially due to geographic reasons.
Once Germany was defeated, the allies focused on Japan. However, the war was won shortly after thanks to the atomic bombs.