Peloponnesian War, (431–404 bce), war fought between the two leading city-states in ancient Greece, Athens and Sparta. Each stood at the head of alliances that, between them, included nearly every Greek city-state.so Greece won the Peloponnesian war i think.
In 1970 when the Aswan High Dam was completed, the annual Nile floods and sediment stopped for most of Egypt's civilisation which lived downstream. In addition to creating electricity, the dam allowed Egyptians to control the flow of water and build upon the Nile's banks with certainty that it wouldn't be flooded.
