In December 1978, Vietnam invaded Cambodia and soon took over most of the country, establishing a pro-Vietnamese government; with the Khmer Rouge removed from power, the floodgates opened and Cambodians attempted to cross into Thailand in large numbers.
Vietnam invaded Cambodia. This was in December 1978. Vietnam soon took over most of the country. This was in December 1978. Vietnam soon was establishing a pro-Vietnamese government. This was in December 1978. The floodgates opened. This was in December 1978. This was with the Khmer Rouge. This Khmer Rouge was removed from power. Cambodians attempted to cross into Thailand in large numbers. This was in December 1978.