sentences:  After the Ottoman Rule, the village was annexed to Bulgaria as "Chernomen" until 1919, when the village was ceded to Greece in the Treaty of Neuilly.In 1997 under the Kapodistrias reform, the community of Ormenio became part of the new municipality of Trigono with 12 other former communities.At the 2011 Kallikratis reform Trigono became a municipal unit of the municipality Orestiada.