In 1833, five hundred Polish refugees, suspected of supporting the Frankfort attempt in Germany, quitted France for Switzerland, and soon afterward unsuccessfully invaded Savoy in conjunction with some Italian refugees. Crowds of refugees from every quarter joined them and formed a central association, Young Europe, whence branched others, Young France, Young Poland, Young Germany, and Young Italy. The principal object of this association was to draw the German journeymen apprentices (_Handwerks-bursche_) into its interests, and for this purpose a banquet was given by it to these apprentices in the Steinbrölzle near Berne. These intrigues produced serious threats on the side of the great powers, and Switzerland yielded. The greater part of the refugees were compelled to emigrate through France to England and America. Napoleon's nephew was, at a later period, also expelled Switzerland. His mother, Queen Hortense, consort to Louis, ex-king of Holland, daughter to Josephine Beauharnais, consequently both stepdaughter and sister-in-law to Napoleon, possessed the beautiful estate of Arenenberg on the Lake of Constance. On her death it was inherited by her son, Louis, who, during his residence there, occupied himself with intrigues directed against the throne of Louis Philippe. In concert with a couple of military madmen, he introduced himself into Strasburg, where, with a little hat, in imitation of that worn by Napoleon, on his head, he proclaimed himself emperor in the open streets. He was easily arrested. This act was generously viewed by Louis Philippe as that of a senseless boy, and he was restored to liberty upon condition of emigrating to America. No sooner, however, was he once more free, than, returning to Switzerland, he set fresh intrigues on foot. Louis Philippe, upon this, demanded his expulsion. Constance would willingly have extended to him the protection due to one of her citizens, but how were the claims of a Swiss citizen to be rendered compatible with those of a pretender to the throne of France? French troops already threatened the frontiers of Switzerland, where, as in 1793, the people, instead of making preparations for defence, were at strife among themselves. Louis at length voluntarily abandoned the country in 1838.