Another war erupted between the Ottomans and Russia in May 1736. Russian forces captured Azov (1736) and Ochakov (1737), but failed to take Bender and suffered immense losses from disease and logistical challenges after unsuccessfully invading the Crimea in 1738. In 1737 Austria joined the war on the Russian side, but suffered disastrous defeats against the Ottomans, particularly in the Battle of Grocka. By 1739 the Ottomans had reconquered Belgrade, forcing the Austrians to make peace. Abandoned by their allies, Russia too sued for peace, abandoning all of their conquests except for Azov.