The Moroccan - American Treaty of Friendship in 1786 became the oldest non-broken U.S. friendship treaty .
Sultan Mohammed III of Morocco declared on 20 December 1777 that American merchant ships would be under the protection of the Sultan of Morocco and could thus enjoy safe passage .
The Moroccan - American Treaty of Friendship in 1786 became the oldest non-broken American friendship treaty .
Sultan Mohammed III of Morocco declared on 20 December 1777 that American merchant ships would be under the protection of the Sultan of Morocco and could thus enjoy safe passage .