what is a cool presentation name on the vietnam war?

There could be several ---
(i) The illegal War
(ii) The Foolish War
(iii) Eisenhowers War (sorry "Wayne T" but the war was started by Eisenhower in 1954 when he violated the "1954 Geneva Agreements on Indochina")
(iv) The Media War
(v) The misunderstood war
(vi) The mislabled War. -- It was actually the Second Indochina War with three countries being fought over -- Vietnam (1954-1975), Laos (1954 -1975) and Cambodia (unofficially and illegally from 1966 with cross-border "hot-pirsuits" by ground and air, semi-officially from January 1969 with the Menu bombing and officially from March 1970 to April 1975).
(vii) The war of mislabelling -- The "People's Army of Vietnam" (PAVN) being called the NVA ; The "National Liberation Front of Southern Vietnam" (NLF) being falsely called the VC (a shortened derogatory slang for Viet Nam Cong San, meaning Vietnamese Communist, something that less than 4% of the NLF were). Dissidents between 1954 and 1960 being called VC when the NLF was not formed until December 1959. They were just nationalists who wanted a rfeturn to the "1954 Geneva Agreements on Indochina". The calling of all anti-Lon Nol forces in Cambodia as "Khmer Rouige" which were only one of five factions fighting against the US and the Lon Nol troops.

I hope this has been of help, and given you other possible alternative titles you may come up with, and even different lines to take within your presentation.

"We Were Always Looking For A Guy Named Charlie"

Kill 'em All And Let God Sort 'Em Out.

Acid test.