Son Sann
Vietnam had invaded Democratic Kampuchea in December 1978 and entered Phnom Penh on January 6, 1979. Immediately the Royal Thai Government approached Son Sann with offers of support for a non-communist resistance force. Son Sann, in turn, flew to New York City to ask Prince Norodom Sihanouk (who was preparing to address the UN General Assembly) to lead the KPNLF, but Sihanouk declined and even refused his support.