Swampy Sparring Marines participate in a weapons of opportunity free sparring event to culminate the martial arts instructor trainer course at Marine Corps Base Quantico, Va., June 21, 2017. The event challenged the students to show expertise in ground fighting, weapons free sparring, and bayonet and knife techniques. Marine Corps photo by Sgt. Melissa Marnell SHARE IMAGE: Download Image: Full Size (2.93 MB) Tags: training, Featured Photos , Northcom, Northern Command, MARINE CORPS, MARINES Photo By: Sgt. Melissa Marnell VIRIN: 161004-M-DY697-002D.JPG Photo Gallery