In 1975 initial military engagements arose Coming_to_be between communist Vietnam and the Cambodian Khmer Rouge regime , which resulted in Causation the Vietnamese occupation Control of Cambodia for over a decade .

The Vietnamese push to completely destroy the Khmer Rouge unavoidably brought Causation them into open conflict Hostile_encounter with Thailand .

In order to acquire Getting full control over Cambodia the People 's Army of Vietnam needed to dislodge Removing the remaining Khmer Rouge leaders and units , which had retreated Escaping to the remote areas along the Thai-Cambodian border .

According to some academics such as Ben Kiernan and Donald Kirk , the Samlaut rebellion is seen Perception_active as the initial beginnings of the Cambodian revolutionary movement ( the Cambodian Civil War ) that eventually led to victory of the Communist forces Khmer Rouge and the establishment of the Democratic Kampuchea .

( National United Front of Kampuchea ) wanted to demonstrate unity between Sihanouk supporters and the Khmer Rouge , understating the extent of the development of the revolutionary opposition to Sihanouk before his overthrow .

With the escalation of the war in South Vietnam in 1965 , the colonization of Battambang entered Arriving a new phase as thousands of Khmer Krom families began to cross the Vietnam-Cambodia border .

The Khmer peasants either had to work Employment for them as coolies or were displaced from their homeland .

Despite their open display of cooperation Collaboration with the Vietnamese , the Khmer Rouge leadership feared that the Vietnamese communists were scheming Arranging to form Coming_to_be an Indochinese federation with Vietnam as the dominant force in the region .

In order to preempt an attempt by the Vietnamese to dominate them , the Khmer Rouge leadership began Process_start purging Removing Vietnamese-trained personnel within their own ranks as the Lon Nol regime capitulated Surrendering in 1975 .

Then , in May 1975 , the newly formed Coming_to_be Democratic Kampuchea , dominated Control by the Khmer Rouge , began Process_start attacking Attack Vietnam , beginning Process_start with an attack Attack on the Vietnamese island of Phú Quốc .

In January 1978 the Vietnamese military withdrew Escaping because their political objectives had not been achieved Achieve ; the Khmer Rouge remained Temporary_stay unwilling to negotiate Communication seriously .

By the end of 1978 , Vietnamese leaders decided Deciding to remove Removing the Khmer Rouge-dominated regime of Democratic Kampuchea , perceiving Coming_to_believe it as being pro-Chinese and hostile towards Vietnam .

During that period , the Khmer Rouge 's Democratic Kampuchea continued to be recognised Agree_or_refuse_to_act by the United Nations as the legitimate Legality government of Kampuchea , as several armed resistance groups were formed Coming_to_be to fight Hostile_encounter the Vietnamese occupation Control .

Cambodia 's pathway to peace proved to be difficult , as Khmer Rouge leaders decided Deciding not to participate Participation in the general elections Change_of_leadership , but instead they chose Choosing to disrupt Hindering the electoral process by launching Motion military attacks Attack on UN peacekeepers and killing Killing ethnic Vietnamese migrants .

Shortly afterwards , the constitutional monarchy was restored Recovering and the Khmer Rouge was outlawed by the newly formed Coming_to_be Cambodian government .

The name `` Damrey '' means `` elephant '' in Khmer , the official language of Cambodia .

The impact Influence of the bombing Attack campaign on the Khmer Rouge guerrillas , the PAVN , and Cambodian civilians in the bombed areas is disputed Quarreling by historians .

As time went on most of the bombing Attack was carried out Attack to support Supporting the Cambodian government of Lon Nol in its struggle Confronting_problem against the communist Khmer Rouge .

China launched a punitive expedition in response Response to Vietnam 's invasion Attack and occupation Control of Cambodia in 1978 ( which ended Process_end the rule of the Chinese-backed Khmer Rouge ) .

After a brief lull , Kublai Khan in 1281 turned Motion his attention to Southeast Asia , demanding Request tribute from Pagan , the Khmer Empire , Đại Việt and Champa .

The Sino-Soviet split re-emerged Coming_to_be following the lull during the Vietnam War and conflict between North Vietnam and its Cambodian allies in the Royal Government of the National Union of Kampuchea , and the newly-formed Democratic Kampuchea begun Process_start almost immediately in a series of border raids by the Khmer Rouge that erupted into the Cambodian–Vietnamese War , with Chinese forces directly invading in the Sino-Vietnamese War and subsequent border conflicts .