<prompt> Pedzisa mutsara unotevera: Pakutanga, North Vietnam yaitongwa nemakomonisiti yaiva mubatsiri akasimba weKhmer Rouge apo yairwisana neRepublic yeKhmer yaLon Nol muhondo yevagari vemo ya19701975. Chete pashure pokunge vaKhmer Rouge vatora simba zvinhu zvakatanga kuoma, apo musi wa1 May 1975 zuva rakatevera pashure pokunge vaKhmer Rouge vatora simba  <response>: Saigon yakawa, masoja eKhmer Rouge akapinda muzvitsuwa zvePhu Quoc neTho Chau, achiuraya vagari veVietnam vanopfuura mazana mashanu; zvichitevera kurwisa uku, zvitsuwa izvi zvakakurumidza kutorwazve neHanoi. Kunyange ipapo, kuita kwokutanga kwavaVietnam kwakanga kusina kujeka, uye kwakatora Vietnam nguva refu kuti iite chiito nesimba, nokuti kurudziro yokutanga yakanga iri yokuronga zvinhu mumba memhuri. 