Elements of the U.S. mobile riverine force and 400 South Vietnamese in armored personnel carriers engage communist forces in the Mekong Delta. During the battle, 235 of the 300-member Viet Cong battalion were killed.
The mobile riverine force was an Army-Navy task force made up of the U.S. 9th Infantry Division (primarily the 2nd Brigade and associated support troops) and the U.S. Navy's Task Force 117. This force was often combined with units from the South Vietnamese 7th and 21st Infantry Divisions and the South Vietnamese Marine Corps. The mobile riverine concept called for Army troops to operate with Navy gunboats and troop carrier boats in the Mekong Delta. This gave the force the capability to travel 150 miles in 24 hours and launch combat operations with its 5,000-man force within 30 minutes after anchoring. The mobile riverine force was activated in June 1967. It conducted operations throughout the Delta until the responsibility for this mission was transferred to the South Vietnamese forces in April 1971, as part of the "Vietnamization" program.