The key role played by the United States ahead of Zimbabwe's independence in resolving the sticky point of land redistribution has just come to light.
By Martin Plaut
BBC Africa analyst
The land issue has always been emotive in Zimbabwe - as can be seen with the current crisis sparked off by the government seizure of mainly white-owned farms in 2000.
And it was important to all parties in 1980 that signed the Lancaster House Agreement that led to the transformation of Rhodesia into Zimbabwe.
The road to the agreement was not straight forward, and as an investigation by the BBC's The Westminster Hour programme has revealed, it was much bumpier than at first suspected.