The geography of Assyria significantly influenced its development as an empire, with fertile lands and access to the Tigris and Euphrates rivers facilitating agriculture and military expansion. Assyria, located in northern Mesopotamia, was characterized by a flat landscape that promoted a warlike culture and a merciless policy towards conquered peoples. The empire ultimately fell due to its violent reputation and the formation of a united army against it, leading to the destruction of its capital, Nineveh.