To the best of my knowledge the statement is true. The emperor was an absolute ruler and had power over the army, the church, and the government. Specifically, the emperor was commander-in-chief of the army and was the absolute leader of the church and the government.
The assertion is correct to the best of my knowledge. The emperor ruled with unlimited authority, commanding the army, the church, and the government. The emperor was the absolute ruler of the church and government, as well as the commander-in-chief of the army.
