In One Piece world, a handful of wars has Occurred so far. But, we only have seen one of them so far. There a total of 5 known wars in One Piece, and today I have decided to make a list of all those wars.
5. Edd War
This War was fought between Roger Pirates, and Golden Lion Pirates and their alliances. Edd War occurred in the New World. The reason behind this war was that Shiki wanted the ancient weapon that Roger found, and also asked Roger to become his Right hand man. Naturally, Roger refused it and a war broke out. Roger Pirates emerged victorious, while Golden Lion Pirates and Alliance suffered heavy casualties.