Battle of the Sambre

The battle of the Sambre, launched on 4 November 1918, was a large-scale offensive aimed at crossing the Sambre line and breaking the last German defensive line before the Belgian plains. Conducted jointly by French, British, and Belgian armies under Foch's coordination, the operation was planned as the final blow to precipitate German collapse. It was marked by frontal assaults against entrenched defences, canal crossings, and intense fighting in flooded or wooded zones.

Since August 1918, the Allies had conducted a series of victorious offensives across the Western Front. The German army, exhausted, was retreating but still offered desperate resistance. The Sambre region, between Maubeuge, Aulnoye, Mons, and Namur, had been fortified since 1914. Allied command wanted to cross it before armistice negotiations concluded, to obtain solid strategic guarantees. The attack mobilized a very wide front, including the French 10th Army, 1st Belgian Army, and British Fourth Army.

The offensive began at 5:45 a.m., preceded by massive bombardment during the night. Mangin's French troops crossed the Sambre at Mormal forest and advanced toward Bavay. Terrain was difficult, flooded by overflows and German destruction. Makeshift bridges were built under enemy fire. Infantry advanced supported by Renault FT tanks and mobile artillery. On the left flank, the British broke through at Ors at the cost of heavy losses. Coordination between Allied armies improved thanks to well-honed logistics and overwhelming air superiority.

The breakthrough was decisive. In three days Allied forces advanced 30 km. The German army lost its last defensive lines in northern France and withdrew in disorder toward eastern Belgium. The French army retook Hirson, Maubeuge, and La Capelle. This military victory accelerated armistice discussions, pushing German generals to recognize their inability to defend the territory. French success reinforced Mangin's prestige, whose army was among the most offensive at the end of the conflict.