Significances

1. The first atomic bomb in history was dropped, causing terrible destruction and enormous loss of human life. Since the two bombings in WWII, nuclear/atomic weapons have never been used in battle again

2. The U.S. took Guam from Japan and still has possession of it today

3. The U.S. became a hegemon in the East Asia, and has maintained military and diplomatic presence there since

4. Japanese imperialism in Asia ended

5. The U.S. Navy became the strongest in the world as a result of the war with Japan, and has remained the best ever since