Pup Promotion Marine Corps Lance Cpl. Chesty XVI, the Marine Corps mascot, stands at attention while Navy Secretary Carlos Del Toro promotes him from the rank of private first class, during a ceremony at Marine Barracks Washington, Jan. 17, 2024. SHARE: Download: Full Size (3.11 MB) Tags: Marine Corps, mascot, chesty Credit: Marine Corps Lance Cpl. Chloe McAfee VIRIN: 240117-M-UM973-1029M.JPG Photo Gallery