When Harry S Truman made the decision to use the atomic bomb what position did he hold

He was the President.

Explanation:

This was no theoretical research project. It was created to destroy and kill on a massive scale. As president, it was Harry Truman's decision if the weapon would be used with the goal to end the war.

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.

the answer to your question is ( syngman rhee) have a great day