Complex sentence: Its location near the Cambodian border made it the scene of bitter fighting during the Vietnam War, in 1967 the Viet Cong "272nd" and "273rd Regiments" attempted to overrun the CIDG camp there but was repulsed.
Split into simpler sentences: Its location near the Cambodian border made it the scene of bitter fighting during the Vietnam War. In 1967 the National Liberation Front (NLF, or derogatively "Viet Cong") "272nd" and "273rd Regiments" attempted to overrun the Civilian Irregular Defense Group camp there but was repulsed.