You will earn this trophy for finishing the mission called The Tale of Ryuzo. This is one of the first really crazy and cinematic missions in scope and presentation. The goal is to find food for the Straw Hats in order to recruit them for your cause. What follows is infiltrating into enemy lines, scaling lighthouses, before eventually commandeering enemy ships and raiding them for supplies. This mission will also introduce you to a mechanic where your ally, in this case Ryuzo, can be downed by enemies if they're abused enough. When this happens you have two options. Either hold down  to revive them, or kill all the enemies currently fighting you.

Once you and Ryuzo jump off the boat to safety, the mission will end. At the results screen, the trophy will pop. Can't lead a revolution on an empty stomach.