Who was the 40th president of the us?

Ronald Reagan was the 40th president of the United States.

in 550 b.c.e. cyrus the great, the leader of the persians, conquered the medes and united the iranian people under one ruler for the first time. cyrus became the first king of the persian empire and went on to establish one of the largest empires in world.

answer; i believe that the correct answer is (chronological order);