Alliances profoundly affect military strategy and international relations by creating networks of mutual defense and cooperation. Nations in alliances can pool resources, share intelligence, and coordinate military operations, thereby enhancing their collective security. For instance, NATO exemplifies how alliances can deter aggression through a united front. On the other hand, alliances may also provoke rivalries, as nations outside these agreements reassess their security strategies. Furthermore, shifting alliances can impact global stability, leading to the realignment of power dynamics. In essence, alliances shape not only military policies but also the broader context of diplomacy and international negotiations.