Egypt and Israel
Israel and Egypt.
Camp David Accords
In September 1978, Jimmy Carter negotiated a peace between Egypt and Israel at the Camp David accords.
Israel.
Carter negotiated the Camp David Accords, a peace treaty between Egypt and Israel at the Presidential Vacation home. Harding signed the treaty ending World War 1 on the golf course, but I don't think he was on vacation.
John Adams!
France and Spain
Ghent, Belgium. American and British representatives negotiated the peace agreement in Ghent, Belgium, after the war in 1812.
It destroyed Confederate hope for negotiated peace.
Pedro A. Paterno :D
It destroyed Confederate hope for negotiated peace.