 When the 101st deployed to South Vietnam in 1967, it included the 1st and 2nd Battalions of the 501st.The division participated in twelve campaigns and was decorated by the Republic of Vietnam on three occasions.The 2nd Battalion, 501st, while attached to the 3rd Brigade, 101st received a Presidential Unit Citation for their actions during the Battle of Hamburger Hill in May 1969; the unit's battle streamer is embroidered Dong Ap Bia Mountain.