held an important strategic position. As well as being an important heavily fortified port with 60,000 inhabitants at the mouth of the riverVistula, it was a direct threat to the French left, as it lay within Prussian lands but to the rear of the French army as it advanced eastward. It was also a potential dropping off point for allied troops, that could threaten the French army by opening another front to their rear. Danzig was also difficult to attack, being only accessible from the west, while all other directions were covered either by the Vistula or wetlands. Furthermore, it had precious resources of great interest to the Grande Armée in planning a substantial campaign in the east. In a letter dated 18 February 1807, Napoleon noted to Marshal Lefebvre:
Your glory is linked to the taking of Danzig: you must go there.
Order of battle
The task of taking the city was in mid-February given to Marshal Lefebvre and his 10th corps. The marshal was aided by generals Chasseloup-Laubat, who commanded the engineering works, and Baston de Lariboisière, who commanded the artillery. Together they were the two best specialists in their respective fields in the French army. General Drouet was the chief of staff. The 10th corps comprised two Polish divisions under General Jan Henryk Dąbrowski, one Saxon corps, one contingent from Baden, two Italian divisions and about 10,000 French troops, in total about 45,000 men. Inside Danzig stood 14,400 men under the Prussian commander General Count Friedrich Adolf von Kalkreuth. Napoleon was however to describe these men as ‘canaille'
Encirclement
On 20 March, following Napoleon's orders to encircle the city, French General Schramm led 2,000 troops to the north bank of the Vistula beyond the outlying Weichselmunde fort, occupying a position directly to the north of the city. On 2 April the ground had thawed enough to be able to begin digging siege trenches, a second trench was begun on 8 April and completed on 15 April and a third was finished on 25 April. With the fall of the Silesian fortress of Schweidnitz to Vandamme on 11 April, the large siege guns there were transferred to Danzig, arriving on 21 April.
Attempts to relieve the city
On the 23 March the French batteries opened fire. Russian forces made an attempt between 10–15 May to bring 7,000 reinforcements to the city, led by General Kamensky, ferried in 57 transports under the escort of the British sloop of warFalcon and a Swedish ship of the line. Owing to the absence of the Swedish vessel, Kamensky was delayed in his operations. This allowed Lefebvre time to reinforce his positions, and the outnumbered Russian troops were beaten back with a loss of 1,500 men killed and wounded. A further attempt by the British 18-gun praamDauntless to bring a badly needed 150 barrels of gunpowder via the river failed. Dauntlessran aground near a battery, which bombarded her until grenadier guards from Paris were able to capture her.
Siege continues
After these failed attempts to relieve the city, the siege and mining continued. On 21 May Marshal Mortier's corps arrived, making it possible to storm the Hagelsberg. Seeing that he could no longer hold out, Kalkreuth sued Lefebvre for peace, requesting the same capitulation terms given by the Prussians to the French in Mainz in 1793. The terms were finally agreed were that the garrison could march out with all the honours of war, with drums beating, matches lighted, and standards flying. The terms were generous because Napoleon was eager to put an end to the siege since the summer was approaching and he needed to remove the threat to his rear and to reposition the troops elsewhere.
Surrender and aftermath
Danzig capitulated on 24 May 1807. Napoleon then ordered the siege of the nearby Weichselmünde fort, but Kamensky had fled with his troops, and the garrison capitulated shortly afterwards. The battle cost the French 6,000 killed and wounded, while the Prussians lost 3,000 killed, wounded and sick, and the Russians 1,500. In recompense for Lefebvre's services, Napoléon granted him the title “Duc de Dantzig” in a letter to the Senate dated 28 May, but he did not inform him directly, merely noting to the marshal on 29 May,
I am very satisfied with your services, and I have already given proof of this, which you will discover when you read the latest news from Paris and which will leave you in no doubt as to my opinion of you.
On 9 September 1807, Napoleon established the Free City of Danzig, as a semi-independent state. This territory was carved out from lands that made up part of the Kingdom of Prussia, consisting of the city of Danzig along with its rural possessions on the mouth of Vistula, together with the Hel Peninsula and the southern half of the Vistula Spit. From late January to 29 November 1813, Russian forces laid siege to the city and the French occupying forces withdrew on 2 January 1814.
