Number the events in chronological order. ________ Athens and Sparta declare a truce. ________ Athens sends its navy to conquer Sicily. ________ Sparta becomes the dominant power in Greece. ________ Sparta lays siege to Athens, starting a war lasting ten years. ________ Athens and Sparta form their own alliances of Greek city-states. ________ Athens and Sparta join together to defeat the Persians in the Persian Wars.