How many U.S. presidents became president after serving in the Navy during World War II?

By serving in the military, One proves they would make the ultimate sacrifice for the country . It requires a person of exceptional character to volunteer in times of war and that sence of duty follows them throughout their life time. I believe a president should be of exceptional character , don't you ?

Chezikeets, will yes of course the president of the United States or the leader of any free country in the world should be a person of exceptional character.

I counted 5