“With regard to Cambodia, the illegality of Nixon’s behavior was clear-cut. The potential fourth article of impeachment referred to the fact that for 14 months, before the United States’ invasion, the president approved hundreds of B-52 strikes on that country. The covert mission first came to light in July 1973, when retired Maj. Hal Knight testified before the Senate Armed Services Committee that in his capacity as the supervisor of radar crews in South Vietnam, he had helped falsify the records of at least two dozen missions by disguising American airstrikes in Cambodia as attacks inside South Vietnam.
By the time the Judiciary Committee was considering impeachment, the tragic consequences of America’s military intervention in Cambodia were clear. The relatively stable government of Prince Sihanouk had been overthrown, the society was consumed by civil war, an insurgent Khmer Rouge had morphed into a major force and thousands of Cambodian civilians had been displaced or killed.”