This agreement establishes a zone of separation and calls for the disengagement of forces. This agreement was also known as the Sinai Separation of Forces Agreement  (later known as Sinai I). Under its terms, Israel withdrew its forces from the areas west of the Suez Canal held since the October 1973 ceasefire and also pulled back several miles on the Sinai front east of the canal, where three roughly parallel security zones were created, each about six miles wide, for Egyptian, UN, and Israeli buffer zones. The UN Zone was occupied by the Second United Nations Emergency Force (UNEF) created by UN Security Council Resolution 340.