Complex sentence: The major battles between the Turks and Muslims was over the region of Transoxiana in Turkestan, the larger conflict also saw the Khazars play a minor role in the Turkestan although their campaigns centered on the Caucasus, North Caucasus, Mosul and the Khazar capital of Atil.
Split into simpler sentences: The major battles between the Turks and Muslims were over the region of Transoxiana in Turkestan. Meanwhile, the larger conflict also saw the Khazars play a minor role in Turkestan although their campaigns centered on the Caucasus, North Caucasus, Mosul and the Khazar capital of Atil.