 However, their Thessalian allies under Jason of Pherae dissuaded them from shattering what remained of the Spartan army.Instead, Epaminondas occupied himself with consolidating the Boeotian confederacy, compelling the previously Spartan-aligned polis of Orchomenus to join the league.The following year the Thebans invaded the Peloponnesus, aiming to break Spartan power for good.