 Complete the following phrase:  At Athens, the oligarchic government that had ruled since 411 gave way to a restored democracy within a few months of the battle. An expeditionary force under Thrasyllus was prepared to join the forces in the Hellespont. This force, however, did not depart until over a year after the battle, and although the Athenians eventually recaptured Byzantium and resumed collecting tribute from Chalcedon, they never truly pressed the advantage that Cyzicus had given them. Largely, this was a result of ficial inability; even after the victory, the Athenian treasury was hard pressed to support large-scale offensive operations. Meanwhile, the Spartans, with Persian funding, quickly rebuilt their fleet, and would go on to undermine the Athenian advantage. Athens would win only one more naval battle in the war, at 