Which Vietnam operation was associated with riverine patrols and coastal interdiction to cut off Viet Cong supplies?

• A. Market Time
• B. Rolling Thunder
• C. Iron Triangle
• D. Sea Dragon

Answer: (A)

Interdicting Viet Cong supplies through both sea routes and inland waterways was a defining naval approach in Vietnam. Market Time was the operation established to monitor and block maritime movement into South Vietnam, with ships and aircraft patrolling the coast and approaches to major river mouths. It coordinated with riverine forces—the Brown Water Navy—along the delta to stop and inspect vessels, interdicting boats carrying arms, ammunition, and other contraband heading toward Viet Cong units. The goal was to sever logistical lifelines by cutting off supply flows from the coast and along river channels into the VC’s area of operations.

Rolling Thunder was the sustained bombing campaign over North Vietnam, not a maritime or riverine interdiction effort. The Iron Triangle refers to a VC base area rather than a naval operation. Sea Dragon focused on coastal shipping interdiction and mining, but it emphasized naval strikes at sea rather than integrating riverine patrols that worked directly with coastal interdiction to choke Viet Cong supplies. Market Time best fits the described combination of river and coastal interdiction to disrupt supply lines.