The primary goddess associated with war in Celtic mythology is Morrigan. She is often depicted as a triple goddess and is associated with battle, fate, and death. Morrigan is known to shape-shift and is often linked with ravens, which symbolize her presence on the battlefield and her connection to the otherworld. Her interventions in various myths illustrate her role in determining the outcomes of conflicts and influencing the fates of warriors. The Morrigan embodies the complexity of war, combining aspects of strength, fearlessness, and the inevitable consequences of battle.