No fighting allowed in the war room

While the 1976 book The Final Days focused on the Watergate scandal, a section covers highlights of earlier years in the Nixon White House. Regarding Vietnam:
By the spring of 1970, Nixon, Kissinger and the NSC [National Security Council] staff faced a crisis. Cambodia was being used as a staging area by Communist troops. The possibility of invasion was discussed and an invasion plan was developed. Many of the liberal academics on Kissinger's staff -- among them Morton H. Halperin, Anthony Lake and William Watts -- were strongly opposed. "Don't worry about it," [Alexander] Haig advised them. "The Old Man will never go through with this. I've seen him come up to these decisions and then back away."

But the President did give his approval. Haig was elated. The others weren't. Kissinger called them his "bleeding hearts."

Watts went to Kissinger alone to state his objections.

"Your view represents the cowardice of the Eastern Establishment," Kissinger told him.

Furious, Watts got up out of his chair and moved toward Kissinger. He was going to punch him. Kissinger moved quickly behind his desk. He was not serious, he said. Watts, whose selection as the NSC aide coordinating the Cambodian invasion had just been approved by the President, resigned.

"You've just had an order from your Commander in Chief," Haig said. Watts could not resign.

"Fuck you, Al," Watts said. "I just did."

Kissinger called his staff together in the Executive Office Building to plead for their support of the decision. "We are all the President's men," he said, "and we've got to behave that way."
-- From The Final Days, by Bob Woodward and Carl Bernstein.