The U.S. National Archives has released newly declassified documents from former President Richard Nixon's administration, much of it dealing with the Vietnam War.
The 50,000 pages of documents cover the period from 1969 to 1973, as U.S. involvement in the war was winding down.
The National Archives says that some of the papers describe deployment of forces in the war and military operations in North and South Vietnam, Cambodia, and Laos.
Another file consists of correspondence between Washington and the U.S. embassy in what was then Saigon, now Ho Chi Minh City.
Some of the papers cover domestic issues, such as President Nixon's pardon of controversial labor leader Jimmy Hoffa.
The documents had been kept out of the public eye for more than three decades following Mr. Nixon's resignation in August 1974.