The next year, during the Hundred Days when Napoleon escaped from Elba and regained the French throne, in the hostilities that followed Schwarzenberg commanded the Army of the Upper Rhine (an Austrian-allied army of about a quarter of a million men). But shortly afterwards, having lost his sister Caroline, to whom he was deeply attached, he fell ill. A stroke disabled him in 1817, and in 1820, when revisiting Leipzig, the scene of the "Battle of the Nations" that he had directed seven years before, he suffered a second stroke. He died there on 15 October.