The Armenian national movement included social, cultural, but primarily political and military movements that reached their height during World War I and the following years, initially seeking improved status for Armenians in the Ottoman and Russian Empires but eventually attempting to achieve an Armenian state.

United Armenia, also known as Greater Armenia or Great Armenia, is an Armenian ethno-nationalist irredentist concept referring to areas within the traditional Armenian homeland—the Armenian Highland—which are currently or have historically been mostly populated by Armenians. The idea of what Armenians see as unification of their historical lands was prevalent throughout the 20th century and has been advocated by individuals, various organizations and institutions, including the nationalist parties Armenian Revolutionary Federation and Heritage, the ASALA and others.