The Peloponnesian War began as a result of Sparta becoming angry with Athens due to their unjust taxes. Athens battle strategy was to avoid land at all costs because they knew that the water was not the Spartan's forte. The Spartan's strategy was to march into Athens and burn their food supply. The reason they wanted to do this is because Athens had to trade for their food so they would have to rely on others for more food. Sparta had an advantage when a plague hit Athens and killed 1/3 of it's population. During this plague, Pericles, Athens leader had died. Athens was in a period of exile for they were lost without their leader. In 421 B.C. Athens had called a temporary truce. Later, In 415 B.C. Athens invaded one of Sparta's allies, Sicily. Sparta become outraged at this act and invaded Athens. Sparta not only invaded Athens but also, defeated Athens. Athens finally surrendered in 404 B.C. In the end, Athens did lose there power and weatlh but they never lost there independence. A little while later Sparta creates a league to replace the delian league but this fails.