After the failed 30 September Movement coup, the army and militias kill hundreds of thousands of alleged communists, paving the way for Suharto's rise.
A sustained US aerial bombing campaign against North Vietnam.
Two battalions of US Marines land at Đà Nẵng, the first American ground combat units deployed to Vietnam.
Singapore separates from Malaysia and becomes an independent republic led by Lee Kuan Yew.
The first major battle between US Army forces and the North Vietnamese army, fought in the Central Highlands.
A clash between USS Maddox and North Vietnamese torpedo boats leads Congress to pass the Gulf of Tonkin Resolution, enabling US escalation.
A smaller Viet Cong force repels an attack by South Vietnamese troops with US advisers near Mỹ Tho.