4:20th Infantry

```html • Vietnam War Origins: The 4th Battalion, 20th Infantry Regiment (4/20th Infantry) was reactivated and served with distinction during the Vietnam War, attached to the 11th Infantry Brigade, Americal Division. • “Sykes’ Regulars” Lineage: The 20th Infantry Regiment, to which 4/20th belongs, traces its lineage back to the Civil War, originally organized in 1861 as part of the Regular Army. • “Sykes’ Regulars” Nickname: The regiment earned the nickname “Sykes’ Regulars” after its commander, General George Sykes, who led them in several Civil War battles. • Operation Iron Mountain: 4/20th Infantry participated in Operation Iron Mountain, a major security and pacification effort in Quang Ngai Province, Vietnam, from 1969 to 1971. • Vietnam Honors: The battalion received several unit citations for valor and meritorious service, including the Republic of Vietnam Cross of Gallantry with Palm. • “Bandits” Call Sign: During Vietnam, 4/20th Infantry was known by the call sign “Bandits,” which became an enduring symbol of their unit identity. • Firebase Support: The battalion operated from and defended several firebases, including Firebase Bronco, which was a key outpost in the Duc Pho area. • Post-Vietnam Service: After Vietnam, 4/20th Infantry was inactivated but has since been reactivated in different roles, including as a training unit at Fort Polk, Louisiana, supporting the Joint Readiness Training Center (JRTC). • Current Mission: Today, 4/20th Infantry (“Warriors”) trains deploying units in simulated combat and counter-insurgency at JRTC, playing “opposing force” (OPFOR) to prepare U.S. and allied troops for real-world missions. • Motto: The unit’s motto is “Sykes’ Regulars—Toujours Prêt” (Always Ready), reflecting its proud lineage and commitment to readiness. ```