Final answer:
American troops intervened again in the Dominican Republic in 1965 to prevent a communist takeover.
Step-by-step explanation:
In 1965, American troops intervened again in the Dominican Republic to prevent a communist takeover. This intervention was in response to an uprising by liberal Dominican army officers who wanted to return Juan Bosch, a liberal reformer, to power. The American troops believed that preventing a communist takeover was essential for national security and placed a conservative government in power.