cavalry, where he became deputy commander. After the governor’s assassination he had sided with Augustinos Kapodistrias and he actively participated in the civil conflicts of the time. During January 1832 he fought as a cavalry officer in the Battle of Argos and in March in the Battle of Loutraki where his forces and those of Nikitaras were defeated by the troops of Ioannis Kolettis. At the same time, he followed a military career as an officer in the regular army while he was actively involved in the political issues of that period, first as a follower of the Russian Party and then of the French Party. In 1834, during the Bavarian regency and the Kolettis government he was imprisoned as a supporter of the Russian Party, whose significant members had made at that time various uprisings in the Greek territory. In 1843, as colonel of the cavalry, he was a leading figure of the 3 September 1843 Revolution against Otto which forced the king to dismiss his Bavarian ministers and grant a constitution. He was appointed military commandant of Athens, promoted to Major General and aide de camp to the king. In 1845 he was dismissed by the army and withdrew from Greece, following an incident between him and Queen Amalia. He went to London, where he became friend with Louis Napoleon, nephew of Napoleon I and later Emperor of the French, which he followed later in Paris and so he became follower of the French policy. In 1848 he made an abortive descent on the Greek coast, in the hope of launching a revolution in the Greek kingdom. He was captured, but soon released and, after a stay in the island of Zante, went to Paris (1853). In 1854, during the Crimean War, he served as Minister of Military Affairs in the Alexandros Mavrokordatos cabinet—imposed by the British and French, and hence called "Ministry of Occupation" by the Greeks. Until Mavrokordatos’ arrival, Kallergis exercised authority as dictator, with the full support of the French occupation troops. This particular government recalled all the Greek officers who participated in the anti-Ottoman revolutionary movements in Thessaly, Epirus and Macedonia to return to Greece while by personal requirement of Kallergis, Otto's adjutants—Gennaios Kolokotronis, Spyromilios, Ioannis Mamouris and Gardikiotis Grivas—were dismissed, while the hitherto Minister of Military Affairs, Skarlatos Soutsos, was suspended. When he was minister, Kallergis formed for the first time in Greece