Upon its creation, the Army numbered 30,000 (out of the Duchy's population of 2.6m). The size of the army was of a considerable economic burden to the small state. The army was expanded several times; it was doubled in 1809. Several regiments were sponsored by the French. For the war of 1812, almost 100,000 men were fielded - more than the Army of the Polish-Lithuanian Commonwealth ever numbered. In the fall of 1813, the Army, reconstructed after the defeat in Russia, numbered about 20,000 or 40,000 (sources vary).