And supported them until long after the Vietnamese put an end to their genocidal regime. The US, alongside China, voted for the Khmer Rouge to keep the UN seet until 1993, 14 years after they were removed.
Hilariously the Wikipedia article is titled "Allegations of US support for the Khmer Rouge" even if it describes factual US support (in the UN), and a bunch of "allegations" based on internal reports confirming them.
