At 1000 hours, the Germans started an assault on the northern flank, but were repelled from most positions with significant losses on both sides.
Fifteen minutes later the German 4th Panzer Division repeated the attack, this time with artillery support and air cover.
The assault was planned in three directions:
Towards the positions of the 19th Regiment and to the north, in order to outflank the brigade
Towards the village of Mokra itself, with approximately 100 tanks and AFVs
Towards the weakened 4th Battalion of the 84th Infantry Regiment
The northern assault was carried out quickly.
Under heavy covering fire, the German tanks, a mixture of Panzer Is and Panzer IIs, managed to break into the forest and secured a road leading across the railway line to the village of Izbiska Duże, to the north of the Polish headquarters.
At 1030, the Polish 4th Squadron of the dismounted 19th Cavalry Regiment was attacked from behind and pushed out of the forest.
This threatened the separation of their 19th and 21st Regiments.
Colonel Filipowicz ordered the 19th Regiment to withdraw to the other side of the railway, but the way was already occupied by German tanks and the unit was effectively surrounded.
However, the Polish defence was reinforced by the arrival of the Armoured train No.
53, known as Śmiały ("Bold"), which arrived on the battlefield just as the German tanks were crossing the railway line.
It stopped in the middle of the German column and opened fire on the German tanks at close range with its two 75mm guns and heavy machine guns.
The German column was dispersed and retreated with heavy losses, losing a number of Panzer I and II tanks, while the 19th Regiment crossed the railroad under cover of the armoured train.
Although the 19th Regiment suffered heavy losses, it managed to regroup on the other side.

Simultaneously, a German attack on the main positions of the 21st Regiment near the village of Mokra began.
German tanks managed to outflank the 4th Squadron of the Regiment from the north, at the same time attacking it frontally.
The Polish defenders were pushed out of the forest and heavy fighting for the village itself started.
The Germans lost four tanks to the Polish 2nd Artillery Battalion firing from across the railway, but the 4th Squadron was in retreat, fighting for almost every house in the village and suffering heavy losses.
Again the day was saved by Śmiały.
It arrived in the area at the height of the battle and opened fire from a distance of almost 2.5 km, which was beyond the effective range of all German tank guns of the time, in the end destroying or knocking out several more Panzer I and IIs.
Also, more Polish cavalry, made up of the 12th Uhlans Regiment, was moved to the area; the men dismounted and reinforced the 21st Regiment.
At 1000 hours, the Germans started an assault on the northern flank, but were repelled from most positions with significant losses on both sides. Fifteen minutes later the German 4th Panzer Division repeated the attack, this time with artillery support and air cover. The assault was planned in three directions:
Towards the positions of the 19th Regiment and to the north, in order to outflank the brigade
Towards the village of Mokra itself, with approximately 100 tanks and AFVs
Towards the weakened 4th Battalion of the 84th Infantry Regiment
The northern assault was carried out quickly. Under heavy covering fire, the German tanks, a mixture of Panzer Is and Panzer IIs, managed to break into the forest and secured a road leading across the railway line to the village of Izbiska Duże, to the north of the Polish headquarters. At 1030, the Polish 4th Squadron of the dismounted 19th Cavalry Regiment was attacked from behind and pushed out of the forest. This threatened the separation of their 19th and 21st Regiments. Colonel Filipowicz ordered the 19th Regiment to withdraw to the other side of the railway, but the way was already occupied by German tanks and the unit was effectively surrounded. However, the Polish defence was reinforced by the arrival of the Armoured train No. 53, known as Śmiały ("Bold"), which arrived on the battlefield just as the German tanks were crossing the railway line. It stopped in the middle of the German column and opened fire on the German tanks at close range with its two 75mm guns and heavy machine guns. The German column was dispersed and retreated with heavy losses, losing a number of Panzer I and II tanks, while the 19th Regiment crossed the railroad under cover of the armoured train. Although the 19th Regiment suffered heavy losses, it managed to regroup on the other side.
Simultaneously, a German attack on the main positions of the 21st Regiment near the village of Mokra began. German tanks managed to outflank the 4th Squadron of the Regiment from the north, at the same time attacking it frontally. The Polish defenders were pushed out of the forest and heavy fighting for the village itself started. The Germans lost four tanks to the Polish 2nd Artillery Battalion firing from across the railway, but the 4th Squadron was in retreat, fighting for almost every house in the village and suffering heavy losses. Again the day was saved by Śmiały. It arrived in the area at the height of the battle and opened fire from a distance of almost 2.5 km, which was beyond the effective range of all German tank guns of the time, in the end destroying or knocking out several more Panzer I and IIs. Also, more Polish cavalry, made up of the 12th Uhlans Regiment, was moved to the area; the men dismounted and reinforced the 21st Regiment.
Battle of Mokra