Since the 1960s, the 2nd Infantry Division has been responsible for defending South Korea against potential invasion from North Korea. This is the History of the 2nd Infantry Division - the Warrior Division.

The 1st Marine Division is the largest unit on active duty in the United States Marine Corps. Nicknamed "the Old Breed," or the "Blue Diamond," the 1st Marine Division is also the most decorated unit of its size in the USMC. The 1st Marine Division is the ground combat element of the I Marine Expeditionary Force (I MEF) and is stationed at Camp Pendleton in California.