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1970
Duc Duc massacre
Scott Walker-
South Vietnam
Duc Duc

1970
Da Nang massacre
Scott Walker-
South Vietnam
Da Nang

1970
Lon Nol overthroughs Sihanouk establishes Khmer Republic
March 18: Sihanouk is overthrown by Defense Minister Lon Nol, Sirik Matak and Cheng Heng. March 23: Sihanouk announces the unitary national front of Kampuchea (F.U.N.K), which includes the Khmer Rouge.
Cambodia

1970​

1970​

1970 - Prime Minister Lon Nol overthrows Sihanouk in coup. He proclaims the Khmer Republic and sends the army to fight the North Vietnamese in Cambodia. Sihanouk - in exile in China - forms a guerrilla movement. Over next few years the Cambodian army loses territory against the North Vietnamese and communist Khmer Rouge guerrillas
Cambodia

1971
Battle of Chenda II
The North Vietnamese army continues to fight the forces of Lon Nol while the Khmer Rouge forge their army. In December, Phnom Penh forces launched Operation Chenla II and were beaten by the North Vietnamese. 
Scott Walker-
Cambodia​

1971
Khmer Rouge strengthen
The North Vietnamese army continues to fight the forces of Lon Nol while the Khmer Rouge forge their army. In December, Phnom Penh forces launched Operation Chenla II and were beaten by the North Vietnamese. ​

Cambodia

1971​

1972
Anti-Ballistic Missile Treaty
Scott Walker-
International

1972
Biological Weapons Convention​

Scott Walker-
International

1972
Lon Nol elected president of new Khmer Republic
Lon Nol was elected president of the Khmer Republic.
Scott Walker-
Cambodia​

1972
Lon Nol becomes president
First national election of the Khmer Republic. Lon Nol was elected president of the Khmer Republic.​

Cambodia

1973
Paris Pease Accords of 1973 signed
January 27: signing the majority of the fighting in Cambodia while the Communists Vietnamese are replicated in the frontier zones. The United States is re-bombing Cambodia again. The Khmer Rouge ordered the creation of cooperatives in all their zones . The American congress imposes the cessation of the bombardments on 15th of August.​

International

1974
John Gunter Dean
Became United States Ambassador to Cambodia
Scott Walker-
Cambodia​

1974
Khmer Republic looses ground to the Khmer Rouge in the country side
Last year of the Cambodian full war. The Khmer Rouge took control of the insurgency movement by eliminating the returning communists from North Vietnam, members of the Vietnamese minority and the Sihanoukists.
Scott Walker-
Cambodia​

1974
Khmer Rouge flexing muscle
Last year of the Cambodian full war. The Khmer Rouge took control of the insurgency movement by eliminating the returning communists from North Vietnam, members of the Vietnamese minority and the Sihanoukists.
Cambodia