Born in Paris on 20 May 1783, Theodore Jacques Parisot came out of the École Polytechnique in the Navy. Ensign maintained in September 1805, he served in the flottille de Boulogne. Adjutant Major of the 2nd Regiment of the fleet in 1807, he participated in 1809 in the Walcheren Campaign. Appointed a lieutenant in 1812, he distinguished himself in the defense of Helvoet-Sluys in 1813 and the following year in the Antwerp bombing.