Complex sentence: Kanayan had already become a popular military leader after the victories over the Ottoman Empire at the Caucasus Campaign, and between March 1918 and April 1918 he was appointed by the Armenian National Council military commissar to the Administration for Western Armenia of the Ararat region.
Split into simpler sentences: Kanayan had already become a popular military leader after the victories over the Ottoman Empire at the Caucasus Campaign. Between March 1918 and April 1918 he was appointed by the Armenian National Council military commissar to the Administration for Western Armenia of the Ararat region.