To unite means to come together as one or to merge into a single entity, often in the context of nations or groups seeking shared goals or identity. In the historical backdrop of national unification, this term emphasizes the movements and ideologies that sought to bring together disparate regions or people into cohesive nation-states, often spurred by a mix of cultural, political, and social factors. The process of uniting can lead to both the formation of new national identities and, paradoxically, tensions with other states or groups that resist such consolidation.