Siege of Phalsbourg
1870 CE.
Shown on the map at 48.768°, 7.258°.
The siege of Phalsbourg was an early battle of the Franco-Prussian War that was fought between the French Empire (later French Republic) against Germany at Phalsbourg near the Vosges beginning on 10 August 1870, and ending on 12 December of the same year.
Text from the Wikipedia article Siege of Phalsbourg, licensed CC BY-SA 4.0.