In The Witcher series, there are many military units of varying kinds.
Captain is a military rank. A banner or a garrison is usually led by a captain. Generally the head of a non-military group (i.e. a gang of bandits) can be called captain as well. Captain is also the title usually given to the leader of the city guard.
A centurion is a non-commissioned officer (or NCO) similar to a Sergeant which commands 100 soldiers.
Commander is a generic term for an officer commanding any armed forces unit. In witcher universe that include generals, head of divisions, brigades, regiments, battalions, companies, free companies or smaller military units, special forces as well as commanders of guerilla or militia troops.
During the Northern Wars, a lowly born Constable Jan Natalis became notorious as successful commander-in-charge of Northern forces being sometimes referred by his subordinates to as "Lord Constable".
- In Polish (original) edition, the two bear different titles: Torquil is a konstabl and Natalis a konetabl. Both derive from the French Connetable, but mean different functions in Polish.
A Decurion is a officer that commands ten soldiers and serves under a Centurion.
Field Hetman of the Crown
Field marshal (or sometimes simply referred to as Marshal) is the title of a supreme commander in the Nilfgaardian military.
Jarl of Skellige
The Jarl of Skellige (Polish: jarl Wysp Skellige) is a title referring to the main commander of the Skellige military forces leading the kingdom's powerful fleet and other branches, thus making them the most faithful aide to the king or queen. Commander differs from regular clan chieftains, with single "jarl" or "earl", by small crown from what appears to be gold and silver.
The lieutenant is usually the Captain's deputy.
Lieutenant colonel is the Colonel's second in command.
Lieutenant general is the General's second in command.
Major general is a military position in the Nilfgaardian army.
Private is generally the lowest position one holds in any military force.
Quartermaster is a regimental officer, usually commissioned from the ranks, responsible for administering barracks, laying out the camp, and looking after supplies.
A Standard Bearer is a soldier whose task is to carry and protect his military insignia on the battlefield.