Arnold arrived in Schuyler's camp at Fort Edward, New York on 24 July. On 13 August, Schuyler dispatched him with a force of 900 to relieve the siege of Fort Stanwix, where he succeeded in a ruse to lift the siege. He sent an Indian messenger into the camp of British Brigadier General Barry St. Leger with news that the approaching force was much larger and closer than it actually was; this convinced St. Leger's Indian allies to abandon him, forcing him to give up the effort.