U.S. Navy Lt. Antonia De Jesus, a nurse with 2nd Medical Battalion, 2nd Marine Logistics Group, practices drawing blood during a Tier IV Tactical Casualty Combat Care course at Marine Corps Base Camp Lejeune, North Carolina, Sept. 29, 2025. 2nd MLG became the first-ever Marine Corps command to host a Tier IV TCCC course and is now hosting its second iteration. The course trains select military service members to become proficient combat paramedics capable of providing advanced casualty care at the point of injury on the battlefield and in austere environments. (U.S. Marine Corps photo by Lance Cpl. Isabella Ramos) - U.S. Navy Lt. Antonia De Jesus, a nurse with 2nd Medical Battalion, 2nd Marine Logistics Group, practices drawing blood during a Tier IV Tactical Casualty Combat Care course at Marine Corps Base Camp Lejeune, North Carolina, Sept. 29, 2025. 2nd MLG became the first-ever Marine Corps command to host a Tier IV TCCC course and is now hosting its second iteration. The course trains select military service members to become proficient combat paramedics capable of providing advanced casualty care at the point of injury on the battlefield and in austere environments. (U.S. Marine Corps photo by Lance Cpl. Isabella Ramos)