Objective: search and destroy operation; To locate and destroy enemy forces in the Bong Son Plain and surrounding areas in II corps' Binh Dinh Province.

Description: The Masher / White Wing operation became the first major campaign to cross corps boundaries when the 3d Marine Division on Operation DOUBLE EAGLE crossed into the Binh Dinh Province. The ARVN operations supporting U.S. sweeps included THAN PHONG II and LI N K T-22. During Phase I, heavy helicopter assaults near Bong Son made contact with the PAVN and VC and forced them back into the ARVN Airborne Brigade. Phase II was an air assault into the An Lao Valley by the 1st Cavalry Division's 2d Brigade. Their sweep of the area did not make enemy contact and ended when they linked with the Marines. However, the Phase III air assault into the Kim Son Valley by the 3d Brigade encountered the 93d Battalion, 2d VC Regiment and drove them for the area. In Phase IV, the 1st Brigade monitered Highway 1 while the 2d Brigade cleared the Cay Giep Mountains by pushing the enemy into the 22d ARVN division. The operation ended when the 1st Cavalry completed its circle of the Bong Son Plains and arrived back at the Cay Giep Mountains. Masher / White Wing was meant to return the civilians to the government, however the fighting resulted in many refugees. Very little pacification efforts were taken. Though thought to be destroyed, the 3d PAVN division soon returned.

Title: The Encyclopedia Of The Vietnam War: A Political, Social & Military History

Title: Preliminary Checklist Of United State Military Operations In Southeast Asia

Vietnam Center & Sam Johnson Vietnam Archive