Since the late 20th century, some of these issues have inspired a pan-Grebo unification sentiment. In its extreme form, it has been part of a political movement to unite virtually all speakers of the sociolinguistic language "Grebo" in the counties of Maryland, River Gee, and Grand Kru. In its recent form, the movement arose as part of the emergence of "political tribes" (factions) during the civil wars of the late 20th century (First Liberian Civil War and Second Liberian Civil War). They defined themselves against the Americo-Liberian power base. In a sense, this was a continuation of the Grebo wars of the 19th century.