Marine special operators with Marine Corps Forces Special Operations Command, MARSOC, and Navy corpsmen practise close quarters combat (CQB) drills during Emerald Warrior 2012, a series of exercises involving special operations forces.
MARSOC's fighting force are the Marine Special Operations Battalions (MSOB).
MSOBs are highly proficient at Direct Action (DA), Special Reconnaissance (SR) and Foreign Internal Defence (FID) operations.
Many MSOB operators are former Force Reconnaissance Marines.