That's nonsense. The Khmer Rouge did not get fully organized until 1970, and even then it had barely 3,000 troops. John Kerry was already back in the States for a year and protesting the war by that time.
There's no way we backed it. It was the Communist Party of Kampuchea.
And I believe they were based in the northeasern plains not the Mekong jungle.
Kerry can't quit lying.