A substitute soldier is often referred to as a "replacement" or "replacement soldier." These individuals are typically brought in to fill the ranks of a unit that has lost personnel due to injury, death, or other reasons. They may also be called "reinforcements" in some contexts.
There was no draft in the south. A man could send a substitute to fight for him.
An African American soldier on the frontier is called a Buffalo Soldier.
A down under soldier is called an anzac.
A soldier in the U. S. Army who fights with a rifle is called a weaponeer. A U.S. Marine is called a rifleman.
A foot soldier was commonly referred to as an infantryman or simply a soldier.
A person who goes to war is called a soldier. They may be a volunteer or a draftee, but they are still a soldier.
A mounted soldier is called a knight. It begins with the letter k.
German Soldier or an Waffen SS Soldier.
Absent Without Leave
A Spanish soldier is called a Red Coat
Citizen-soldier
There is no difference, well, if you know what I mean. You a male a soldier and you call a female a soldier.