Hannibal at Cannae, in 216, had 50,000 veterans against Varro's 50,000 Romans, who were drawn up with their backs to the sea, and were thus unable to withdraw before Hannibal's overwhelming onslaught. Julius Caesar at Alesia had 50,000 Romans against 80,000 Gallic infantry and 15,000 cavalry. At Pharsalus, in the civil war, the Pompeians, with 60,000, were routed by the Caesareans with 25,000, losing 15,000, while Julius Caesar lost only 200. Augustus Caesar formed a standing army of 300,000, his legions consisting of 3,000 heavy infantry, 1,200 light infantry, and 300 cavalry each. Genghiz Khan began with a small force of 6,000, with which he fought and conquered his father-in-law, who had 10,000. At the Battle of the Indus, Genghiz Khan commanded a huge army of 300,000 Tartars. At the battle of Karakin, in 1218, he led 700,000 Tartars against 400,000 Kharismians, completely defeating them. Oliver Cromwell's army, in its most complete form, numbered about 80,000. The army of Frederick the Great, at its highest point of efficiency, numbered 200,000, while the army of Louis XIV. numbered 240,000 men. In 1793, when Republican France was threatened with invasion, and Carnot was "organizing victory," the effective French forces probably numbered 300,000, though the total number available under the newly introduced system of conscription was four times as many, about a million and a quarter. At the battle of Auerstadt-Jena, on Oct. 14, 1806, Napoleon had a French Army of 160,000, against some 140,000 Prussians. About this time Napoleon made the army corps the practical unit instead of the division, as formerly. The Grand Army, which invaded Russia in 1812, totaled 467,000, but this included 280,000 foreign troops. At the battle of Leipsic, a year after the retreat from Moscow, Napoleon, with 155,000, faced 160,000 Austrians, 60,000 Prussians, and 60,000 Swedes under the recreant Frenchman Bernadotte, the ancestor of the present King of Sweden. At Waterloo, the French Army is said to have numbered 72,000, against whom were drawn up, at the beginning of the battle, 24,000 British and 43,500 Dutch and Belgian troops. The Dutch and Belgians withdrew before the end of the battle, their place being taken by Blücher's contingent.