The United States Marine Corps has long lived by Mattis' motto of "no better friend, no worse enemy." They make for very scary opponents, able to defeat enemies who greatly outnumber them — just ask the Chinese about the Chosin Reservoir; they know who really won that battle.
But the Republic of Korea Marine Corps is almost as scary to foes as the United States Marine Corps, and for good reason. While the United States Marine Corps has been around for 242 years, the South Korean Marines have only been around since 1949. That's 68 years. Not bad, but still a mere one-seventh of the time the American leathernecks have been kicking ass.
South Korean Marines during an exercise. (Wikimedia Commons)
South Korean Marines saw action in Vietnam when their 2nd Marine Brigade was deployed alongside two divisions from the Republic of Korea Army. During the war, a company of South Korean Marines was attacked by three battalions of North Vietnamese and Viet Cong troops. When the fighting was finished, the South Korean Marines had triumphed, losing only 15, a small fraction of the 306 enemy troops killed.
U.S. Army studies of the South Korean forces that fought in Vietnam noted that the South Korean troops in general, including their Marines, had taken great steps forward since the Korean War. They even seized more weapons than American units did in similar operations.
Republic of Korea Marines provide security after they dismount a CH-53 Sea Stallion helicopter during the two-day culmination of Exercise Key Resolve/Foal Eagle 2008 at Rodriguez Live Fire Complex in South Korea March 8, 2008. (U.S. Marine Corps photo by Sgt. Freddy G. Cantu)
After the Vietnam War, the South Koreans turned to their Marine Corps to establish a special unit to retaliate against North Korean commando attacks. This unit's motto translates, roughly, to "kill them all, let God sort it out."
Today, the South Korean Marines are looking to modernize their force. On November 23, 2010, North Korean forces shelled Yeonpyeong Island. As a result, South Korean Marines are getting new return-firepower, like the K9 howitzer.