Armenian battalions refer to military units formed by Armenian volunteer conscripts, mostly fighting against the Ottoman forces:
1912-13, Balkan Wars, an auxiliary battle group in Bulgarian Army. It was led by Andranik Ozanian, who was the commander of Armenian auxiliary troops in the Macedonian-Adrianopolitan Volunteer Corps within the Bulgarian army.[1] (Andranik Ozanian#Balkan Wars)
1914-17, World War I, Armenian volunteer units were employed in the Russian Imperial Army. Antranik also in fought in the First World War fought as commander of the First Armenian Volunteer Battalion 7 within the Russian Caucasus Army.[2]