How and why did Assyria and Persia disintegrate?

The collapse of Assyria. The Assyrian state reached the peak of its power in the 8-7th century BC. At that time Assyria was an empire with many conquered peoples. True, in the 7th century BC. Babylonia and Media raised a revolt, they managed to defeat the armies of the Assyrians and ultimately defeat the warlike empire. The end of Assyria falls in 612 BC, when its capital, Nineveh, was destroyed.

The Persian Empire was considered, at one time, one of the largest empires of the east, its borders stretched from the Aegean Sea to the Indus River. True, in the 4th century BC. after the campaign of Alexander the Great, the Persian Empire collapsed.