In the War of the Sixth Coalition, Hinrichs commanded 8,400 Prussian Landwehr at the siege of Küstrin. The operation lasted from April 1813 to 7 March 1814 before 5,000 French troops under Jean-Louis Fournier d'Albe surrendered. Hinrichs led three battalions each of the 1st East Prussian, 2nd East Prussian, and 3rd Neumark Landwehr Regiments, two squadrons of the 2nd Neumark Landwehr Cavalry Regiment, and one 6-pound foot battery.[6] Hinrichs was promoted to Generalleutnant[2] before his death in 1834.[7]