https://en.wikipedia.org/wiki/Administrative_divisions_of_the_Ottoman_Empire
An eyalet (also pashalik or beylerbeylik) was the territory of office of a beylerbey, and was further subdivided in sanjaks. Toward the end of the 16th century, the beylerbeyliks began to be known as eyalets. The beylerbeyliks where the timar system was not applied, such as Habesh, Algers, Egypt, Baghdad, Basra and Lahsa, were more autonomous than the others.