 The United Nations Emergency Force II moved into place between Israeli and Egyptian armies in the Suez Canal area, stabilizing the situation.Resolution 339 primarily reaffirmed the terms outlined in Resolution 338 (itself based on Resolution 242).It required the forces of both sides to return to the position they held when the initial ceasefire came into effect, and a request from the United Nations Secretary-General to undertake measures toward the placement of observers to supervise the ceasefire.