Complex sentence: The YPG are primarily Kurdish, but also recruit Arabs, Turks and westerners, and there are Assyrian/Syriac Christian units integrated into its command structure (Sutoro and Syriac Military Council).
Split into simpler sentences: The YPG are primarily Kurdish, but they also recruit Arabs, Turks, and westerners. There are Assyrian/Syriac Christian units integrated into its command structure (Sutoro and Syriac Military Council).