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Duty, honor... courage... Semper Fi........Frank Horrigan

The United States Marine Corps was one of five branches of the United States Armed Forces. Closely cooperating with the United States Navy for mobility, the Marine Corps acted as the United States force in readiness. In the 21st century, the Marine Corps would spearhead assaults into the Chinese mainland in 2074. Despite claims of fighting a defensive war, American infantry and mechanized divisions landed in Asia, in a counter-invasion of Chinese mainland. In the Yangtze Campaign, U.S. Marines rapidly overran Shanghai and Nanjing, securing a major port for bringing in troops and materiel.[1][2]

On the domestic front, the Marine Corps would be responsible for protecting Navy facilities, especially black sites such as Sugar Grove in Appalachia,[3] participating in war games with other military assets, such as United States Army Rangers,[4] and rounding up civilians for internment in accordance with Executive Order 99066. Due to a shortage of manpower, the USMC would hand these contracts to private military contractors.[5]

Although the United States of America and all of its military branches ceased to exist during the Great War, elements of the Marine Corps seem to have survived in the Enclave, of all places, where the values integral to the Corps were instilled into its servicemen. Frank Horrigan is a noticeable example.[6]


See also: United States Armed Forces materiel and installations

The United States Marine Corps used many of the same weapons as the United States Army,[7] but would use a number of tools unique to the branch, including the riot gear customized for desert operations and Wattz 2000 laser rifles for its sharpshooters.[8] Marine Corp detachments embedded with Navy warships and posted to Navy facilities also used heavy suits of combat armor and specialized infiltration gear in their operations.[9]


  1. Future Weapons Today mentions a Marine's memoirs as a sniper in that area. Both cities are also one of the easternmost points in China and a natural choice for amphibious landings and setting up a bridgehead for bringing in reinforcements.
  2. Desert Ranger Combat Armor
  3. Sugar Grove terminal entries: "8-19-77: External Contractors"
  4. War Game Orders
  5. Internment orders
  6. Frank Horrigan quotes two of three core values of the USMC, together with the motto (Semper Fidelis) in his dying words.
  7. Benjamin Montgomery uses the same gear as Army servicemen.
  8. Future Weapons Today
  9. Both suits of armor, as they appear in Fallout 4 (Far Harbor) and Fallout 76.
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