Coast Guard cutters helped stop four communist supply trawlers during the Tet Offensive. The interception tied coastal blockade work directly to denying resources to forces fighting ashore. Starving an operation of supplies can be as decisive as direct combat, and the Coast Guard's inshore experience suited this work. The episode shows why mission experience can matter more than assigning every maritime task to the largest naval service.
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Vietnam coastal interdiction and the Coast Guard's inshore role
A 1968 interception operation shows how Coast Guard experience in coastal enforcement translated into wartime blockade work.