Complex sentence: In 1412, the Awlad Kenz took control of Nubia and part of Egypt above the Thebaid, and remained the de facto rulers until 1517, when the area was conquered and amalgamated into Egypt by the armies of the Ottoman Sultan Selim.
Split into simpler sentences: In 1412, the Awlad Kenz took control of Nubia and part of Egypt above the Thebaid. The Awlad Kenz remained the de facto rulers of Nubia until 1517, when the area was conquered and amalgamated into Egypt by the armies of the Ottoman Sultan Selim.