Between 5 and 10 August, in a victorious and promising series of confrontations, he took the Góry Szwedzkie region from the Prussians and then lost it after a couple of weeks in a counterattack, for which, despite Kościuszko's warnings, he did not properly prepare. He was injured while trying to recover the lost ground when his horse was shot from under him. In October he led his outnumbered troops in an attack on Prussian entrenchments at the Bzura River, which, at the cost of heavy losses, tied up the Prussians and saved Dąbrowski's corps by allowing it to return to Warsaw.