 Complete the following phrase:  A friend of Prince William, much of Auerswalds youth was spent in Königsberg. After the completion of his education he entered the 1. Leibhusarenregiment of the Prussian Army. In 1812 as part of Napoleons invasion of Russia, Auerswald participated in campaigns in Livonia and Courland under the command of Yorck. He also served from 181315 during the 