An allied commander in WWII, and an avid fan of surfing, Captain Jack Malcolm Thorpe Fleming Churchill aka "Fighting Jack Churchill" aka "Mad Jack" was basically the craziest in the whole war.
He volunteered for commando duty, not actually knowing what it entailed, but knowing that it sounded dangerous, and therefore fun. He is best known for saying that "any officer who goes into action without his sword is improperly dressed" and, in following with this, for carrying a sword into battle. In WWII. And not one of those sissy ceremonial things the Marines have. No, Jack carried a claymore. And he used it, too. He is credited with capturing a total of 42 Germans and a mortar squad in the middle of the night, using only his sword.

