San Kil Mu Sul (SKMS) is a structured combative martial art as taught to the US Special Forces and the 82nd ABN.  Striking techniques are from Tang Soo Do.  Standing Joint Locks, Sweeps, and Throws are drawn from Judo and Japanese Ju Jitsu.  Ground Fighting techniques are from Brazilian Jiujitsu.  Stick and Knife are from the Filipino Martial Arts.