Find him (and his material/base) and destroy him. This was part of the "body count" war that was established for this new (second to the Korean War) "Limited War." Prior to Vietnam, the doctrine called for the traditional method of "taking ground." We didn't do that in Vietnam, in the beginning we tried it, but the war evolved in "attrition of the enemy" destroy more of them than they can of us, "body counts" were the way of keeping score of how many of the enemy had been slain.
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Find them, destroy them (Search and Destroy).
Vietnam was to be fought by attrition not by gaining ground. The only way of attriting the enemy was to find him & destroy him. Thus the term Search & Destroy.
1964
Strategy-Attrition Tactic-Search & Destroy
they launched multirole bombers more than enough to destroy the north vietnamese forces