In the Battle of Mohrungen on 25 January 1807, most of a First French Empire corps under the leadership of Marshal Jean-Baptiste Bernadotte fought a strong Russian Empire advance guard led by Major General Yevgeni Ivanovich Markov. The French pushed back the main Russian force, but a cavalry raid on the French supply train caused Bernadotte to call off his attacks. After driving off the cavalry, Bernadotte withdrew and the town was occupied by the army of General Levin August, Count von Bennigsen. The fighting took place in and around Morąg in northern Poland, which in 1807 was the East Prussian town of Mohrungen. The action was part of the War of the Fourth Coalition in the Napoleonic Wars. After demolishing the army of the Kingdom of Prussia in a whirlwind campaign in October and November 1806, Napoleon's Grande Armée seized Warsaw. After two bitterly fought actions against the Russian army, the French emperor decided to place his troops into winter quarters. However, in wintry weather, the Russian commander moved north into East Prussia and then struck west at Napoleon's left flank. As one of Bennigsen's columns advanced west it encountered forces under Bernadotte. The Russian advance was nearly at an end as Napoleon gathered strength for a powerful counterstroke. Background After the Battle of Czarnowo on 23 December 1806 and the bloody battles of Pułtusk and Gołymin on 26 December, the opposing Russian and French armies went into winter quarters. Emperor Napoleon wanted time to reorganize the Grande Armée's logistical arrangements after their long autumn campaign. In addition, his veteran French troops had expressed displeasure at having to fight in Poland during the harsh winter weather. In late 1806, Field Marshal Mikhail Kamensky's Russian army in Poland constituted two major wings under Generals Bennigsen and Friedrich Wilhelm von Buxhoeveden (Buxhöwden). Bennigsen commanded Lieutenant General Alexander Ivanovich Ostermann-Tolstoy's 2nd Division, Lieutenant General Fabian Gottlieb von Osten-Sacken's 3rd Division, Lieutenant General Dmitry Golitsyn's 4th Division, and Lieutenant General Alexander Karlovich Sedmoratsky's 6th Division. The initial strength of Bennigsen's force, before the December battles, was 49,000 infantry, 11,000 regular cavalry, 4,000 cossacks, 2,700 artillerymen, 900 pioneers, and 276 guns. Of these, from 55,000 to 60,000 were able to take the field. Buxhöwden led Lieutenant General Nikolay Tuchkov's 5th Division, Lieutenant General Dmitry Dokhturov's 7th Division, Lieutenant General Peter Kirillovich Essen's 8th Division, and Lieutenant General Heinrich Reinhold von Anrep's 14th Division. Buxhöwden's