Believed he had power over both churches
A secular leader can be any leader that does not allow the church to interfere with the business of the country. Secularization is separating the church from the state, so a secular American leader can be pretty much anyone from recent history like Obama, or Bush, or Reagan, or even Kennedy who although sometimes attacked for his Catholicism, was still secular and did not mix his beliefs with the state.
Answer:
They did not participate in World War 1. But in World War 2 they joined because of alliances they had with the USA.
Explanation:
A. Very few Roman emperors in the centuries after Augustus were competent rulers; most were insane, greedy, or both.