They were called rebels, or more colloquially, Johnny Reb.
Union
You need to be more specific and clarify what you mean by paid for in return. In return for what? Soldiers in professional armies receive a salary. Soldiers in armies based on conscription receive a small allowance
The combined armies of about 20 Greek city-states led by Sparta.The combined armies of the southern Greek city-states, led by Sparta.
The southern solders were called rebels.
rebels
rebels..........or Johnny Reb
The soldiers of the Confederacy were in "rebellion" against the United States. Hence, they were called rebels, or Johnny Rebs.
In ancient times, heavily armed foot soldiers were called heavy infantry. This term is often used to describe the soldiers in the armies of Alexander the great.
Southern soldiers of the Confederacy were often called "rebels" as they were rebelling against the Union.
Ernest Edward Tucker has written: 'Soldiers and armies' -- subject(s): Armies, Soldiers
In ancient times, heavily armed foot soldiers were called heavy infantry. This term is often used to describe the soldiers in the armies of Alexander the Great.
The armies have generals because the general help the soldiers get the job done. The general help tell what the soldiers should and should not do.