Complex sentence: The Battle of Sevan (Armenian:) was a turning point in the history of a seven year war, after the battle, Armenian troops under the command of Ashot cleared the central and northern region of the country from foreign invaders.
Split into simpler sentences: The Battle of Sevan (Armenian:) was a turning point in the history of a seven year war. After the battle, Armenian troops under the command of Ashot cleared the central and northern region of the country from foreign invaders.