The Gurkha Regiment of the British Army has a fearsome reputation that is well deserved. They are currently fighting in Afghanistan.
http://en.wikipedia.org/wiki/Royal_Gurkha_Rifles
Previously, during the Falklands War, Argentinian military manning defensive positions on the island were anticipating fighting British Army forces, and held their positions until they discovered that the Ghurkas were being deployed. This broke the Argentinian ranks and they deserted en masse, with intent to surrender before combat was engaged. This was a wise choice.
The large knife traditionally carried by Gurkhas is called the Kukri. An example of its typical use was in silencing enemy sentries. If the enemy were not wearing helmets, the Gurkha would silently sneak up behind him and cut his head in half, vertically. If he was wearing a helmet, he would be approached at an angle and his head would be cut off.
When will this guy get the Victoria Cross?
Indeed, less one of their number who managed to get himself in a spot of bother.