Ten Beard

Birth
Ten Beard was born to a long line of pirates in Madagascar, who for thousands of years collected weapons within their vault. Their vault had built up millions of weapons by the time Ten Beard was born, and when his parents died, he inherited the vault and continued to work on it.

Moon Wars
Ten Beard was extremely active during the Moon Wars, specifically during the Pirate Wars. He used the chaos of the war as an excuse to plunder millions of weapons from those fighting, which included historical figures with extremely famous weapons.

Specifically, Ten Beard used the reincarnation and presence of the Knights of the Round Table to attempt to gather their famous weapons, destroying Clarent in an attempt to steal Excalibur for his own vault, before it was stolen from him by Merlin to use in his Resurrection Ritual.