Advent of Nuclear Weapons in 1945 Forever Changed Foreign Relations in of States that Possessed Nuclear Weapons. Instead of Victory in War, Deterrence and Stalemate Were the Most Desired Objectives of their Nuclear Arsenals. The Best Use of Nuclear Weapons Now Lay in Their Non-Use and No-First Use (NFU) has Since Come the be Seen as the Crucial First Step in Ensuring Deterrence Credibility or Even Complete Disarmament.