In the Battle of Mohrungen on January 25, 1807, most of a First French Empire corps under the leadership of Marshal Jean-Baptiste Bernadotte fights a strong Russian Empire advance guard led by Major General Yevgeni Ivanovich Markov.

The French push back the main Russian force, but a cavalry raid on the French supply train causes Bernadotte to call off his attacks.

After driving off the cavalry, Bernadotte withdraws and the town is occupied by the army of General Levin August, Count von Bennigsen.

The fighting takes place in and around Morąg in northern Poland, which in 1807 is the East Prussian town of Mohrungen.

The action is 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 had seized Warsaw.

After two bitterly fought actions against the Russian army, the French emperor had decided o place his troops into winter quarters.

However, in wintry weather, the Russian commander moves north into East Prussia, then strikes west at Napoleon's left flank.

As one of Bennigsen's columns advances west it encounters forces under Bernadotte.

The Russian advance is nearly at an end as Napoleon gathers strength for a powerful counterstroke.