Irredentism

Irredentism is a political idea where a country seeks to reclaim or incorporate territory that it considers historically, culturally, or ethnically connected to it, but which is currently controlled by another nation. This often arises from a desire to reunite people of the same identity or to strengthen national borders, sometimes leading to territorial disputes or conflicts. Essentially, it's about a nation’s effort to expand or defend its borders based on perceived rightful claims rooted in shared identity or history.