National Highway 19 (Vietnam)
National Highway 19, in Central Vietnam, connects the seaport of Qui Nhon, via An Khe to Pleiku. Mang Yang Pass is the site where the French Groupe Mobile 100 (GM100) was ambushed and destroyed in 1954.
It is a strategic road, with control of its junction with National Highway 14 cutting South Vietnam in half. This was attempted at the Battle of the Ia Drang, and was successful in the 1975 Fall of South Vietnam.