Nuon Chea
On 29 March 1970, the PAVN launched an offensive against the Khmer National Armed Forces, with documents uncovered after 1991 from the Soviet archives revealing that the invasion was launched at the explicit request of the Khmer Rouge following negotiations with Nuon Chea. Historian Jussi Hanhimäki writes that "the MENU operations pushed the North Vietnamese forces...in east Cambodia westward. American bombers followed suit."