This was too easy. Of course Ace was the one to be captured, he couldn't NOT pick a fight with the Marines to save his ass. And of course you were the one Whitebeard assigned to go bust him out, seriously, couldn't Ace do it himself? After sneaking into the Marine base to help your 2nd division commander escape his prison cell, finding a pathetic Marine, beating him up, and stealing his uniform, all that was left was to find Ace in the cell room, which was easy as all Marine bases had the same layout, managing your way to the prison cells, Ace is fast asleep, snoring loudly in his cell. Time to wake up the sleeping beauty.