During four and a half years the battalions were involved in major operations such as: Junction City, the largest operation conducted up to that time, Lam Son II, Paul Bunyan, Bù Đốp (aka Battle of Hill 172), An Lộc, and An Lộc II and numerous other operations and small unit actions. Contact with the enemy was almost daily. When the 1st Infantry Division stood down in March and April 1970 the 1st and 2nd Battalion's colors were cased and the soldiers were either reassigned to other units in Vietnam or returned to the United States to be discharged.