Gaston D. Armand joined the marines at age 16 and spent most of the time as an errand boy. He worked hard, and trained to the fullest of his abilities. A year after he joined the marines he became a regular recruit and sailed around the sea along the marine ship "Muscleman" captained by vice admiral Strong Arm Jones. Armand gained the ability of the Dino Dino no Mi, Model: Diplodocus when he battled some pirates and found their stash of belongings. He had no idea what the fruit was at the time and ate it regardless. After he returned to the ship and a few hours passed he knew the name of his devil fruit and began to understand his new abilities. Vice Admiral Jones took interest in Armand's new found ability and trained him along their journeys and made him his successor. Through long life