 The Lord of Athens and Thebes, Guy I de la Roche, also entered the war against William, along with other barons of Central Greece.Their defeat at the Battle of Karydi in May/June 1258 effectively brought the war to an end in an Achaean victory, although a definite peace treaty was not concluded until 1262.Following the Fourth Crusade, southern Greece had been divided among several Latin lordships, the most powerful of which was the Principality of Achaea, which controlled the entire Peloponnese peninsula.