Question

Why did the United States invade the island of Grenada? to prevent a Communist government from spreading to other Caribbean islands to use Grenada as base to blockade Cuba to keep out terrorists from the Western Hemisphere

Answer 1

The main reason why the United States invaded the island of Grenada was "to prevent a Communist government from spreading to other Caribbean islands", but it was also to protect the lives of almost 1,000 Americans who were living on the island at the time. 

Answer 2

The answer is the first one that says "to prevent a Communist government from spreading to other Caribbean islands"