The final stroke of the battle belonged to the British. Around 3 pm, Riedesel sent a messenger to Burgoyne for instructions. He returned two hours later with orders to guard the baggage train, but also to send as many men as he could spare toward the American right flank. In a calculated risk, Riedesel left 500 men to guard the vital supply train and marched off toward the action with the rest of his column. Two of his companies advanced on the double and opened vicious fire on the American right, and Fraser's force threatened to turn the American left flank. In response to the latter threat, Arnold requested more forces, and Gates allowed him to dispatch Ebenezer Learned's brigade (2nd, 8th and 9th Massachusetts). (If Arnold had been on the field, these forces might have instead faced the larger danger posed by Riedesel's force.) Fortunately for the American right, darkness set in, bringing an end to the battle. The Americans retreated back to their defenses, leaving the British on the field.