The bulk of the materials in this collection are "backchannel" cables between the U.S. ambassadors in Saigon (Henry Cabot Lodge, Ellsworth Bunker, and Graham Martin, successively) and the President's national security advisers (McGeorge Bundy, Henry Kissinger, and Brent Scowcroft, successively) regarding the situation in South Vietnam or the peace negotiations. In addition, there are straight State Department cables, usually between the Secretary of State and the U.S. ambassador in Saigon; talking points prepared for meetings between the ambassador and South Vietnamese officials, mainly President Nguyen Van Thieu; reports and memoranda of conversations of those meetings; drafts of speeches and proposed agreements prepared by both sides; military situation reports; and intelligence reports.