2 June
President Johnson called a White House press conference without advance notice and told reporters that the United States was "bound by solemn commitments" to defend South Vietnam against Communist encroachment, and cited a 25 October 1954 letter from U.S. President Dwight D. Eisenhower to South Vietnamese President Ngo Dinh Diem pledging an American promise to protect the Vietnamese government.

4 June
United Nations Security Council Resolution 189, adopted unanimously, deplored an incident caused by the penetration of military units of South Vietnam into Cambodia and requested compensation for the Cambodians.
The resolution also requested that all States and authorities recognize and respect Cambodia's neutrality and territorial integrity, and sent three of its members to the sites of the most recent incidents and to report back to the council in 45 days with recommendations.

5 June
Ambassador Lodge sent a cable to President Johnson recommending that the United States not send more ground troops into South Vietnam to fight the VC.
Such a step, he cautioned, would be a "venture of unlimited possibilities which could put us onto a slope along which we slide into a bottomless pit."

6-7 June
The Pathet Lao shot down a U.S. Navy RF-8A Crusader reconnaissance jet over Laos.
President Johnson authorized an air strike against a Pathet Lao anti-aircraft battery.
Lieutenant Charles Klusmann was captured by the Pathet lao and escaped from captivity three months later.

8 June
Australia's Minister for Defence announced that the Australian Army Training Team Vietnam would be increased to 83 advisers and their role expanded.

18 June
Canadian diplomat Blair Seaborn met with North Vietnamese prime minister Phạm Văn Đồng to deliver a U.S. message.
The U.S., he said, would choose escalation of the conflict rather than withdrawal and considered the war to be a confrontation with communism and thus of international importance.
Đồng responded that any peaceful settlement in South Vietnam had to result in the withdrawal of the United States, the neutralization of South Vietnam and the eventual reunification of South and North Vietnam.
Seaborn's conclusion was that North Vietnam's leaders were "completely convinced that military action at any level is not, repeat not, going to bring success for the US and government forces in South Vietnam."
The North Vietnamese emphasized their "quiet determination to go on struggling as long as necessary to achieve objectives which they said they were bound to achieve in the long run."

The New York Times published the remarks of a U.S. military adviser in South Vietnam, later identified as Colonel Wilbur Wilson.
Wilson said that the VC were stronger and better armed than they had been three years earlier and that more than 90 percent of their weapons were of U.S. origin, captured from the ARVN.
Wilson advocated a massive increase in the U.S. military commitment to South Vietnam.

20 June
General William Westmoreland replaced General Paul D. Harkins as the commander of the Military Assistance Command Vietnam (MACV) General Maxwell Taylor engineered the appointment of Westmoreland, over the objections of some of his military colleagues.

28 June
French Foreign Minister Maurice Couve de Murville speaking from a studio in Paris to the New York moderators on the NBC show Meet the Press, cautioned that United States could not win the war if it increased its involvement. "
This is not an ordinary war," he said. "
That means a war you can just settle by victory or defeat.
It is not that simple... the problem cannot be settled by military means but should be settled by political means."

29 June
The Republican members of the United States House of Representatives, released a statement saying, "A victory in South Vietnam over the military and subversive threats of Communism is urgently required."
 Republican Congressman Gerald Ford said that the U.S. should "take command of the forces in Vietnam and not simply remain advisers."

New Zealand began its first military involvement in the war by deploying a 25-manNew Zeala
2 June
President Johnson called a White House press conference without advance notice and told reporters that the United States was "bound by solemn commitments" to defend South Vietnam against Communist encroachment, and cited a 25 October 1954 letter from U.S. President Dwight D. Eisenhower to South Vietnamese President Ngo Dinh Diem pledging an American promise to protect the Vietnamese government.
4 June
United Nations Security Council Resolution 189, adopted unanimously, deplored an incident caused by the penetration of military units of South Vietnam into Cambodia and requested compensation for the Cambodians. The resolution also requested that all States and authorities recognize and respect Cambodia's neutrality and territorial integrity, and sent three of its members to the sites of the most recent incidents and to report back to the council in 45 days with recommendations.
5 June
Ambassador Lodge sent a cable to President Johnson recommending that the United States not send more ground troops into South Vietnam to fight the VC. Such a step, he cautioned, would be a "venture of unlimited possibilities which could put us onto a slope along which we slide into a bottomless pit."
6-7 June
The Pathet Lao shot down a U.S. Navy RF-8A Crusader reconnaissance jet over Laos. President Johnson authorized an air strike against a Pathet Lao anti-aircraft battery. Lieutenant Charles Klusmann was captured by the Pathet lao and escaped from captivity three months later.
8 June
Australia's Minister for Defence announced that the Australian Army Training Team Vietnam would be increased to 83 advisers and their role expanded.
18 June
Canadian diplomat Blair Seaborn met with North Vietnamese prime minister Phạm Văn Đồng to deliver a U.S. message. The U.S., he said, would choose escalation of the conflict rather than withdrawal and considered the war to be a confrontation with communism and thus of international importance. Đồng responded that any peaceful settlement in South Vietnam had to result in the withdrawal of the United States, the neutralization of South Vietnam and the eventual reunification of South and North Vietnam. Seaborn's conclusion was that North Vietnam's leaders were "completely convinced that military action at any level is not, repeat not, going to bring success for the US and government forces in South Vietnam." The North Vietnamese emphasized their "quiet determination to go on struggling as long as necessary to achieve objectives which they said they were bound to achieve in the long run."
The New York Times published the remarks of a U.S. military adviser in South Vietnam, later identified as Colonel Wilbur Wilson. Wilson said that the VC were stronger and better armed than they had been three years earlier and that more than 90 percent of their weapons were of U.S. origin, captured from the ARVN. Wilson advocated a massive increase in the U.S. military commitment to South Vietnam.
20 June
General William Westmoreland replaced General Paul D. Harkins as the commander of the Military Assistance Command Vietnam (MACV) General Maxwell Taylor engineered the appointment of Westmoreland, over the objections of some of his military colleagues.
28 June
French Foreign Minister Maurice Couve de Murville speaking from a studio in Paris to the New York moderators on the NBC show Meet the Press, cautioned that United States could not win the war if it increased its involvement. "This is not an ordinary war," he said. "That means a war you can just settle by victory or defeat. It is not that simple... the problem cannot be settled by military means but should be settled by political means."
29 June
The Republican members of the United States House of Representatives, released a statement saying, "A victory in South Vietnam over the military and subversive threats of Communism is urgently required."  Republican Congressman Gerald Ford said that the U.S. should "take command of the forces in Vietnam and not simply remain advisers."
New Zealand began its first military involvement in the war by deploying a 25-manNew Zeala
1964 in the Vietnam War