Jan. 28, 2019
Here is a memo written by the US Joint Chiefs of Staff after the Six Day War where they describe which territory Israel must retain for peace. It was declassified in 1979.
It is sort of amazing that this document has not received more publicity. There was an article detailing the full text in the Journal of Palestine Studies and Wall Street Journal had an article about this memo in 1983.
The recommendations included keeping most of the West Bank, all the Golan Heights, all of Gaza and only limited amounts of the Sinai (all assuming the Arab nations remain enemies, of course.)
29 JUN 1967
1. Reference is made to your memorandum, dated 19 June 1967, subject as above, which requested the views of the Joint Chiefs of Staff, without regard to political factors, on the minimum territory, in addition to that held on 4 June 1967, Israel might be justified in retaining in order to permit a more effective defense against possible conventional Arab attack and terrorist raids.
2. From a strictly military point of view, Israel would require