Answer:
But in the pre-dawn hours of July 31, 1964, U.S.-backed patrol boats shelled two North Vietnamese islands in the Gulf of Tonkin, after which the Maddox headed to the area. As it cruised along on August 2, it found itself facing down three Soviet-built, North Vietnamese torpedo boats that had come out to chase it away.
The southern colonies were very farming based. Whereas the other colonies had other things like the NE colonies had whaling and fishing.
The United States stopped Southern Korea from becoming a Communist nation.
Answer:
I didn't see any of the following But the Attack on Pearl Harbor is the correct answer :)