Wikileaks has published about 1.7 million US diplomatic and intelligence reports from 1973 to the end of 1976.
The records, dubbed as "The Kissinger Cables" include 1.3 million full diplomatic cables and 320,000 originally classified records, intelligence reports, and congressional correspondence.
The published records also include allegations that former Indian Prime Minister Rajiv Gandhi was a middleman in an arms pact and the first impressions of ultimate British PM Margaret Thatcher.
The documents, which have not yet been completely released, are only available for viewing at the US National Archives and Records Association (NARA).
The latest publishing is claimed to be five times as large as ‘Cablegate’, which is a trove of more than 250,000 US diplomatic documents initially posted by the Wikileaks in 2010.
The agency has created a searchable database of the secret or formerly confidential diplomatic communications that it dubs the Wikileaks Public Library of US Diplomacy, or PlusD.
Wikileaks founder Julian Assange is hiding in the Ecuadoran Embassy in London since June 2012, while has secured political asylum from the South American country upon losing a legal battle against exile to Sweden, where he has been sought for questioning over sexual abuse claims.