One Piece Chapter 3, page 5: Chapter 3: Enter Zolo: Pirate Hunter

Luffy and Koby arrive at the massive Marine Base. Koby is hesitant and nervous about entering, saying, "B-but I haven't mentally prepared myself yet... And those people sure were scared when they heard the captain's name..." Meanwhile, Luffy climbs up the stone wall with a "SHUMP" to peer inside, hoping to catch a glimpse of the "demonic beast" Roronoa Zolo.