Sabaody Archipelago.

You just happen to be at Sabaody Archipelago, Sabaody Park. Then you saw The Worst Generation, featuring the newest and most dangerous Pirate Captains, and of course, they're crews. They are just running around, causing trouble outside of the Human Auctioning House. With Luffy, Law, and Kidd out in the front door. Marines have surrounded the place.

Luffy: "Haha, don't worry, guys! We got this."