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Siege of Graudenz
	Part of the War of the Fourth Coalition
	; Map of the siege of Graudenz in 1807
Date	22 January – 11 December 1807
Location	Graudenz, Prussian Partition of Poland (now Grudziądz, Poland)53°29′33″N 18°46′34″E / 53.49250°N 18.77611°E
Result	Prussian victory
Belligerents
French Empire Grand Duchy of Hesse; Electorate of Saxony; Polish insurgents;	Kingdom of Prussia
Commanders and leaders
Marie François Rouyer; Claude Victor-Perrin; Johann Georg Schäffer von Bernstein; Georg Friedrich August von Polenz	Wilhelm René de l'Homme de Courbière
Strength
Variable; 7,000	4,500–5,709 men
Casualties and losses
Unknown	761 dead; 88 captured; 53 missing; 826 deserted;

War of the Fourth Coalition

200km
125miles

Friedland

27

26

25

24

23

22

21

Eylau

20

19

18

17

16

15

14

13

12

11

10

9

8

Berlin

7

6

5

4

Jena–Auerstedt

3

2

1

⬤ current battle

⬤ Napoleon not in command

⬤ Napoleon in command

The siege of Graudenz or siege of Grudziądz was a siege during the Napoleonic Wars between 22 January and 11 December, 1807. As part of the War of the Fourth Coalition the Prussian fortress at Graudenz in West Prussia in the Prussian Partition of Poland (now Grudziądz, Poland) was besieged by forces of the French Empire and its allies. The garrison, commanded by General Wilhelm René de l'Homme de Courbière, withheld blockade and siege for some 11 months, long past the formal Peace of Tilsit. The French abandoned the siege after the borders between Prussia and the new Duchy of Warsaw were defined; Graudenz/Grudziądz staying a Prussian possession until Poland regained independence after World War I.

The Polish 2nd, 4th and 7th Infantry Regiments took part in the battle on the side of Napoleon.^[3]

Notes

^ ^a ^b ^c ^d Bodart 1908, p. 385.
^ ^a ^b Fischer 1907, p. 54.
^ Gembarzewski, Bronisław (1925). Rodowody pułków polskich i oddziałów równorzędnych od r. 1717 do r. 1831 (in Polish). Warszawa: Towarzystwo Wiedzy Wojskowej. pp. 53–55.