The Lancaster House Agreement, signed on 21 December 1979, allowed for the creation and recognition of the Republic of Zimbabwe, replacing the unrecognised state of Rhodesia created by Ian Smith's Unilateral Declaration of Independence in 1965.
The Agreement covered the Independence Constitution, pre-independence arrangements and a ceasefire. It is named after Lancaster House in London, where the parties interested to the settlement attended the conference on independence from 10 September to 15 December 1979.
The parties represented during the conference were: the British Government, the Patriotic Front led by Robert Mugabe and Joshua Nkomo, ZAPU (Zimbabwe African Peoples Union) and ZANU (Zimbabwe African National Union) and the Zimbabwe Rhodesia government, represented by Bishop Abel Muzorewa and Ian Smith.
Following the Meeting of Commonwealth Heads of Government held in Lusaka from 1–7 August 1979, the British government invited Muzorewa and the leaders of the Patriotic Front to participate in a Constitutional Conference at Lancaster House. The purpose of the Conference was to discuss and reach agreement on the terms of an Independence Constitution, to agree on the holding of elections under British authority, and to enable Zimbabwe Rhodesia to proceed to lawful and internationally recognised independence, with the parties settling their differences by political means.