Camp Horno is a camp at Marine Corps Base Camp Pendleton in San Diego County, California. It is the home of the 1st Marine Regiment, sometimes known as "Inchon". As well as being home of MARSOC (Marine Special Operations Command). Camp Horno is predominantly a Marine infantry training area, other branch special operations forces also train at the camp. Camp Horno has earned the unofficial nick name "Grunt Land" by the infantry Marines, who are stationed there.