Although he was immediately promoted to full colonel, it meant that Ypsilantis would not be able to see action again. However, he attended the Congress of Vienna, where he was a popular figure in society (see Auguste Louis Charles La Garde de Chambonas, Souvenirs), and earned the sympathy of Tsar Alexander I, who appointed him his aide-de-camp on 1 January 1816. In late 1817, at the age of 25, he became a major general and commander of the 1st Brigade of Hussars of the 1st Hussar Division.[1]