We must pay attention to the fact that no nation claimed sovereignty over this region.
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Wikipedia
ENHegemony (UK /hᵻˈɡɛməni/ or /ˈhᵻdʒɛməni/, US /hᵻˈdʒɛməni/ or /ˈhᵻdʒɛmoʊni/; Greek: ἡγεμονία hēgemonía, "leadership, rule") is the political, economic, or mil...
ENIn international relations, regional hegemony is the influence exercised over neighboring countries by an independently powerful nation, the regional hegemon.
ENHegemonic stability theory (HST) is a theory of international relations, rooted in research from the fields of political science, economics, and history.