IIUC the bulk of the US Marines in Vietnam fought up north near the DMZ, with the artillery duels etc.
WI instead the Marines were stationed in the south to fight the riverine war in the Mekong Delta? I'd imagine their training, equipment and close working relationship with the Navy would allow them to hit the gournd running. Also I'd imagine that the Marines would come out of Vietnam with years of highly relevant experience which is directly transferable to the Marines' Cold War role.
WI instead the Marines were stationed in the south to fight the riverine war in the Mekong Delta? I'd imagine their training, equipment and close working relationship with the Navy would allow them to hit the gournd running. Also I'd imagine that the Marines would come out of Vietnam with years of highly relevant experience which is directly transferable to the Marines' Cold War role.