sentences:  In conjunction with the Brigade efforts on the Lines of Communication Program, 18th Brigade engineers was involved in a program of affiliation with ARVN (Army of the Republic of Vietnam) engineers.In addition to continuous training programs which the Brigade established to train ARVN equipment operators, the engineers of the 18th provided technical assistance and logistical support to several projects undertaken by the Vietnamese Army, most notably in the construction of the bridge at Tuy Hòa.Upon its completion and opening on 13 February 1971, this bridge became the longest overpass of its type ever constructed in the Republic of Vietnam.