The United States Marine Corps regiments are sorted by status and number, with the current or most-recent type and division like the 2nd Marine Division has 4 units nicknamed Tarawa, The Fighting Sixth and Arm of Decision.
This is a list of United States Marine Corps regiments, sorted by status and number, with the current or most-recent type and division. 2nd Marine Regiment 6th Marine Regiment 8th Marine Regiment 10th Marine Regiment Tarawa The Fighting Sixth Arm of Decision 
