Taylor and Eisenhower.
Professional soldiers for hire.
The Buffalo Soldiers were led by Theodore Roosevelt, one of the nations 45 presidents.
Law is the most common profession among the US presidents.
Many of the former Presidents of the United States have served in one way or another as a man in uniform for the United States. A total of 31 Presidents were soldiers before taking office, ranging from Privates to General of Armies.
Mercenaries
mercenary.
All Roman soldiers were paid. They were professional soldiers.
Professional soldiers, volunteers, and conscripts.
Professional soldiers or the term of mercenary.
Ordinary citizens who serve for a limited time as soldiers, rather than becoming full-time professional soldiers.
Professional soldiers do no not. Actors may.
None. Roman soldiers were paid professionals soldiers who volunteered to join the army. There was no universal conscription. It is the same in modern professional armies. You volunteer to take up a professional career.