Camp David Accords 1978
Egypt and Israel:

Consequently, the 13 days marking the Camp David Accords were considered a success, in part due to US President Jimmy Carter's determination in obtaining an Israeli–Egyptian agreement, which represented considerable time focused on a singular international problem.

The talks failed to produce much as Palestinian representatives refused to participate, and the gap between Egyptian and Israeli positions on Palestinian self-government, not to mention their respective stances on Israeli settlements in Gaza and the West Bank and the legal status of East Jerusalem, proved unbridgeable.

Sadat assassination:
Assassination of Egyptian President Anwar al-Sadat in 1981 although the motive has been debated, likely stemmed from Islamists who opposed Sadat's peace initiative with Israel and the United States, relating to the Camp David Accords.