On 15 July, an additional émigré division arrived to bolster the defense, under the command of Général Sombreuil, but Hermilly was killed in action on 16 July. By the 20th, the fortress had fallen and Hoche swiftly advanced down the peninsula, defeating the hopelessly trapped émigré army. Only Général Puisaye and a small force were able to escape with the British fleet; the remainder were killed in action, taken prisoner, or executed.[citation needed]