4th Assault Amphibian Battalion

U.S. Marines with Company B, 4th Assault Amphibian Battalion, Marine Forces Reserve, stand in formation during a sundown ceremony for the assault amphibious vehicle, Jacksonville, Florida, August 9, 2026. The ceremony formally decommissioned the AAV, ending over half a decade of service as the Marine Corps’ primary ship-to-shore vehicle. The AAV’s retirement paves the way for future amphibious operations as the Marine Corps transitions to the new amphibious combat vehicle. (U.S. Marine Corps photo by Cpl. Van Hoang)

U.S. Marine Corps Cpl. Dereck Vann, bottom, and Sgt. Dylan Gonzalez Orgen, Assault Amphibious Vehicle operators with 4th Assault Amphibian Battalion, 4th Marine Division, fire an M240B machine gun as part of a live-fire range during BRIGHT STAR 25 at Mohamed Naguib Military Base (MNMB), Egypt, Sept. 8, 2025. Exercise BRIGHT STAR 25 is a multilateral U.S. Central Command (USCENTCOM) command-post exercise, field training exercise and senior leader seminar, held in the Arab Republic of Egypt along with other partner nations. Participation strengthens military-to-military relationships between U.S. forces and our Egyptian partners in the USCENTCOM area of responsibility, as well as other participating nations. The exercise enhances regional security and stability by responding to modern-day security scenarios. (U.S. Marine Corps photo by Sgt. Angela Wilcox)

U.S. Marine Corps Lance Cpl. Gilberto Arreguin, an Assault Amphibious Vehicle repairer with 4th Assault Amphibian Battalion, 4th Marine Division, feeds ammunition into an M240B machine gun as part of a live-fire range during BRIGHT STAR 25 at Mohamed Naguib Military Base (MNMB), Egypt, Sept. 8, 2025. Exercise BRIGHT STAR 25 is a multilateral U.S. Central Command (USCENTCOM) command-post exercise, field training exercise and senior leader seminar, held in the Arab Republic of Egypt along with other partner nations. Participation strengthens military-to-military relationships between U.S. forces and our Egyptian partners in the USCENTCOM area of responsibility, as well as other participating nations. The exercise enhances regional security and stability by responding to modern-day security scenarios. (U.S. Marine Corps photo by Sgt. Angela Wilcox)

U.S. Marine Corps Cpl. Andrew Martin, left, a team leader with 4th Combat Engineer Battalion, 4th Marine Division, conducts familiarization training with Staff Sgt. Justin Rodriguez, an Assault Amphibious Vehicle repairer with 4th Assault Amphibian Battalion, 4th Marine Division, prior to a live-fire grenade range during BRIGHT STAR 25 at Mohamed Naguib Military Base (MNMB), Egypt, Sept. 7, 2025. Exercise BRIGHT STAR 25 is a multilateral U.S. Central Command (USCENTCOM) command-post exercise, field training exercise and senior leader seminar, held in the Arab Republic of Egypt along with other partner nations. Participation strengthens military-to-military relationships between U.S. forces and our Egyptian partners in the USCENTCOM area of responsibility, as well as other participating nations. The exercise enhances regional security and stability by responding to modern-day security scenarios. (U.S. Marine Corps photo by Sgt. Angela Wilcox)

U.S. Marines are taught maneuvering techniques in a Multi Mission Reconnaissance Craft-A littoral craft during training at the U.S. Marine Corps Reserve Center, 4th Assault Amphibian Battalion in Tampa, Florida, March 4-7, 2025. The MMRC-A will allow Marines with 4th AABN, 4th Marine Division, to develop operational small craft expertise and proficiency to execute their mission to support the Marine Corps Total Force. (U.S. Marine Corps video by Cpl. Isaiah W. Smith) By License - This video contains audio from a USMC enterprise licensed asset from Adobe Stock: "Intense Action Soundtrack Suspense Intro" by ChillSound / https://stock.adobe.com/

U.S. Marines with 4th Assault Amphibian Battalion, 4th Marine Division, Marine Forces Reserve, conduct high-speed, open water operations using a multi-mission reconnaissance craft–alpha variant, Tampa, Florida, March 4, 2025. The MMRC-A will enable Marines with 4th AABn to continue to train and operate in the maritime domain, supporting service level littoral maneuver concept development efforts. (U.S. Marine Corps photo by Lance Cpl. Van Hoang)

U.S. Marine Corps Lt. Col. Justin Davis (left), inspector instructor of 4th Amphibious Assault Battalion, 4th Marine Division, speaks with USMC retired Brig. Gen. Paul Kennedy (right), a representative of The Whiskey Project on the Multi Mission Reconnaissance Craft-A littoral craft before the predelivery inspection trials in Edenton, North Carolina, Jan. 28, 2025. The predelivery inspection allows the naval architects to ensure that the MMRC-A performs and meet naval standards in small craft (U.S. Marine Corps photo by Cpl. Aaron TorresLemus)