For instance , the rebellion was identified Check to have communist roots as it was the first part of Pol Pot 's social and political two-phased strategy executed by the CPK .

On 25 December 1978 , 150,000 Vietnamese troops invaded Attack Democratic Kampuchea and overran Destroying the Kampuchean Revolutionary Army in just two weeks , thereby ending Process_end the excesses of Pol Pot 's regime , which had been responsible for the deaths Death of almost a quarter of all Cambodians between 1975 and December 1978 .