When Howe realized the defense that Washington was using he came up with a plan of his own. Howe was going to flank Washington and avoid a head on confrontation that could have resulted in more deaths. The plan was set to send a small force to engage Washington in front while Howe lead the main force on a march to go around behind Washington and flank him. On September 11 the battle of Brandywine took place throughout the day Washington received reports of Howe attempting to flank his position, however one report convinced him otherwise, which proved fatal. The day long battle appeared to be a stalemate which would work for the Americans because that would mean that the British wouldn't be able to advance. However that all changed when Howe's forces appeared on the flank.
Late in the afternoon Howes main force began to attack Washington, who quickly realized that the battle was now hopeless and would soon need to begin a retreat. Greene and his men was sent in to the battle by Washington to engage the British, however the main objective now was to cover the American army while it retreated to safety. Small skirmishes took place while they retreated allowing them to cover other Americans as they fell back until the action died down in early evening. The battle was a loss for Washington and it opened the road up to Philadelphia for the British, however the British failed in their objective of destroying Washington's army.