Why did reagan argue that the united states should invade grenada in 1983?

President Ronald Reagan ordered the invasion of Grenada in 1983 because he wanted to secure the region from the coup of Cuban workforce which intentionally killed three American soldiers and continuously dread the people by their military operations. He wanted to build strong precautionary measures not to harm 600 students as well as teachers of St. George’s University which is located in Grenada.