G-6 is one of many more notable Marine bases seen throughout the world. The base itself is located on Sheol, an island further down the first half of the Grand Line, which itself is covered in miles of swamps, marshes and badlands; making travel throughout the island difficult. This acts as the base's natural form of defense against intruders. Given the way both the island and base are set up, it was noted by Rose Glory during the invasion of The Jolly Pirates that G-6 itself was a "death trap," meant to ambush unwary trespassers and lure them to their demise.