Which group or event eventually ended the Byzantium empire​

In the longer term, the rise of Turkish power in Anatolia eventually gave rise to the Ottoman Empire which rapidly conquered the former Byzantine heartland over the course of the 14th and 15th centuries, culminating in the Fall of Constantinople to the army of Sultan Mehmed the Conqueror in 1453.

this act gave the federal government the power to relocate any native in the east to territory west of the mississippi river.