The Siege of Metz lasting from September 3 – October 23 1870 was a crushing defeat for the French during the Franco-Prussian War.
After being defeated at the Battle of Gravelotte, Marshal Bazaine, retreated into the defenses of Metz. There he was besieged by the Prussian Second Army lead by Prince Friedrich Karl on September 3. The French attempted to break the siege first at Noiseville and agiain at Bellevue but were repulsed each time. Although no call for help was made, the French Army of Châlons under the commanded of Marshal Mac-Mahon was nevertheless ordered to reinforce Bazaine. Marching to Metz, the Army of Châlons was trapped and destroyed at the Battle of Sedan. Bazaine was forced to surrender his entire army on October 23 1870. Prince Friedrich Karl and the Prussian Second Army were now free to join the rest of the Prussian forces in the siege of Paris.