 Complete the following phrase:  Both Alexandru and his other brother, Dimitrie, were originally chased out of Wallachia by the Crimean War: in November 1853, the countrys invasion by Russia forced them to settle in Paris. Alexandru studied at the Military School of Saint-Cyr, but he is also known to have held a degree in the sciences. He secured an officers rank in the French Army under the Second Empire, before being recalled to Wallachia by his father during the 