On 30 September, the commander of 10th Army, Walther von Reichenau, ordered his staff to plan the destruction of a large Polish force which was located between the Bug and Vistula rivers. This task would involve the XIV Motorised Corps. It was made up of the 29th and 13th Motorised Infantry Divisions and some independent units. Each German motorised division had a paper strength of 16445 soldiers, 2676 trucks and staff cars, 1944 motorcycles, and 18 armoured cars.
The commander of XIV Corps knew that Polish forces were situated in the forests northwest of Kock. He believed that the commander of the Polish forces was unaware of Warsaw's capitulation.
The commander of 13th Motorised Infantry Division, General Paul Otto, was of the opinion that the Polish forces had become so demoralized that they were incapable of combat, and that a single German battalion would be enough to disarm the Poles and take them to a Prisoner of War camp. Otto sent a force consisting of 3rd Battalion, 93rd Motorized Infantry Regiment supported by 8th Battery, 13th Regiment of Light Artillery. The battalion commander decided to divide his forces into two groups which were sent to Serokomla and Kock. He could count on help from the 93rd Motorised Infantry Regiment with some support forces which followed him.
At 08:30, a column of half-tracks and truck-mounted infantry came under fire from a guard platoon of No.2 company of the 'Wilk' battalion. After a protracted engagement the German troops withdrew. The Polish 179th Infantry Regiment was alerted and moved to defensive positions near and in Kock. At about 11:00 the German lead elements attacked the Polish positions, which were now 2 battalions strong. In spite of supporting artillery fire, the attack failed. At dusk German motorcyclists appeared near the church in Kock and began firing, but subsequently withdrew when the fire was returned.
A company of motorized infantry entered the village of Se...