Battle of Raszyn - EtG After Action Report
April 1809
Situation
In the spring of 1809, Austria launched a major offensive against Napoleon's empire, opening campaigns in Bavaria, Italy, and the Duchy of Warsaw. The northern offensive, commanded by Archduke Ferdinand Karl and his VII Corps of approximately 30,200 men, sought to eliminate the Duchy of Warsaw, secure Austria's eastern frontier, and potentially encourage Prussia to enter the war against France.
Opposing Ferdinand was Prince Józef Poniatowski, commanding approximately 14,000 Polish and Saxon troops supported by 41 guns. Despite being outnumbered by more than two to one, Poniatowski selected a strong defensive position along the marshy banks of the Mrowa River near Raszyn, anchoring his line on the villages of Michałowice, Falenty, Jaworowo, and Raszyn. The flooded ground, narrow bridges, and limited avenues of approach greatly favored the defenders.
Mission
Polish Objective: Delay the Austrian advance, inflict maximum casualties, and deny the enemy control of the key crossings protecting Warsaw.
Battle Narrative
At approximately 1100 hours, General Mohr's Austrian Advance Guard advanced toward the bridge at Michałowice, intending to force a crossing and turn the Polish right flank. Unknown to Mohr, two battalions of the veteran 1st Polish Infantry Regiment occupied the village and had fortified positions overlooking the narrow bridge.
Simultaneously, General Mondet advanced with the main Austrian effort along the Falenty road.
His powerful division—eighteen infantry battalions supported by three batteries of artillery—moved steadily toward the Polish center.
Defending Falenty were two Polish battalions, reinforced by two additional battalions nearby. Covering the front were two regiments of Polish lancers, Regiment No. 6 on the western flank and Regiment No. 3 to the east, supported by a battery of horse artillery.
Recognizing the threat posed by Mohr's column, the Polish No. 6 Lancers shifted westward and aggressively threatened the Austrian Advance Guard's exposed flank. Austrian hussars and supporting artillery deployed to meet the challenge, forcing a prolonged cavalry engagement. For nearly an hour the Polish cavalry delayed the Austrian advance through repeated attacks and determined resistance. Although eventually overwhelmed and driven from the field, their sacrifice bought valuable time for the Polish infantry defending Michałowice.
Meanwhile, on the eastern sector, Austrian infantry deployed into squares to protect themselves from repeated charges by the Polish No. 3 Lancers. Shielded by disciplined formations and the concentrated fire of three artillery batteries, Mondet's infantry pressed relentlessly toward Falenty.
The fighting for Falenty quickly developed into a brutal contest of attrition. Polish infantry defended the village stubbornly, contesting every building and street. Despite determined resistance, the overwhelming Austrian numerical superiority gradually told. Sustained artillery bombardment and repeated infantry assaults eventually forced the Polish defenders from the village, scattering several battalions and leaving Falenty firmly in Austrian hands.
The Austrian cavalry division of twenty-eight squadrons strong, including twelve of Cuirassier finally arrived behind the infantry fighting for Falenty. The Austrian VII corps in its entirety, was on the field and driving.
With Falenty secured, Austrian forces reorganized for an assault across the Mrowa River toward Raszyn.
To the west, Mohr renewed his attack on Michałowice. Austrian infantry surged repeatedly across the narrow bridge into devastating musketry from the entrenched Polish defenders. Time after time the assaults were repulsed with heavy losses. Only after repeated attacks did Austrian troops establish a precarious foothold on the eastern bank. Fierce close-quarters fighting erupted throughout the village as both sides contested control of the bridgehead.
As darkness approached, the fighting gradually subsided.
Results
By the end of the engagement:
- Raszyn remained firmly in Polish hands.
- Jaworowo continued to be held by the Polish army.
- Falenty was securely occupied by Austrian forces.
- Michałowice remained contested, although Austrian troops had successfully established a bridgehead across the Mrowa River.
Victory points awarded for control of the key objectives favored the Polish defenders, who held 200 victory points compared to 100 for the Austrians. Nevertheless, the Polish army had suffered substantially heavier losses in both infantry and cavalry during the day's fighting.
Although unable to destroy Poniatowski's army or immediately capture Warsaw, the Austrians succeeded in forcing a crossing of the Mrowa River, securing Falenty, and inflicting significant casualties. Their tactical gains ultimately outweighed the Polish control of key objectives.
Casualties
Polish-Saxon Forces
- Heavy infantry losses defending Falenty and Michałowice.
- Severe cavalry casualties after prolonged delaying actions by both lancer regiments.
- Several battalions dispersed during the fighting for Falenty.
Austrian Forces
- Significant losses suffered during repeated assaults across the bridge at Michałowice.
- Moderate casualties during the capture of Falenty.
- Hussars incurred losses during prolonged cavalry actions against the Polish lancers.
Assessment
The battle demonstrated the effectiveness of terrain and determined defensive tactics against a numerically superior opponent. Prince Poniatowski skillfully exploited the marshes and narrow crossings to delay the Austrian advance throughout the day. The Polish cavalry, despite ultimately being defeated, performed exceptionally by disrupting Austrian deployments and buying precious time for the infantry.
For the Austrians, persistence and overwhelming numbers eventually carried the day. The capture of Falenty and establishment of a bridgehead at Michałowice provided the operational foothold required for future advances toward Warsaw. However, the inability to break the Polish line at Raszyn or destroy Poniatowski's army prevented the decisive victory Archduke Ferdinand had sought.
Recognizing that his battered force could not withstand another major engagement in its exposed position, Prince Józef Poniatowski ordered an orderly withdrawal during the evening of 19 April. Leaving the battlefield to the Austrians, he preserved the core of his army and resolved to continue the campaign for the defense of Warsaw.
Final Result
Minor Austrian Victory
The Austrians achieved their immediate tactical objectives by capturing Falenty, establishing a bridgehead over the Mrowa River, and inflicting greater casualties on the defenders. However, the determined Polish defense denied Austria a decisive victory and ensured that the campaign for Warsaw would continue.
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