The First siege of Badajoz was a siege carried out during the Peninsular War on the Spanish town of Badajoz, by the French general Soult.
It commenced on 27 January 1811, despite the fact that Gazan's infantry division of 6,000 men, which was escorting the siege-train, would not arrive until 3 February. The previous day, Soult had sent General Latour-Maubourg's six cavalry battalions across the Guadiana to blockade the fortress's northern approach.
In order to draw some of the Allied forces away from Masséna and the Lines of Torres Vedras, Soult had led an expedition of 20,000 men into Extremadura with the aim of capturing the Spanish fortress at Badajoz.
Dividing his army into two contingents, he advanced into Extremadura via the two main passes leading from Andalusia into the Guadiana valley, with the intention of rejoining at Almendralejo. Although the columns commanded by Latour-Maubourg had been confronted by 2,500 Spanish and Portuguese cavalry near Usagre on 3 January 1811, it was only a screen covering the retreat beyond the Guadiana of a Spanish infantry division commanded by General Mendizabal. Latour-Maubourg was therefore able to take up his position near Almendralejo and await the arrival of Soult's second French column.
Not yet being able to besiege so strong a fortress as Badajoz because of his reduced force, Soult changed his original plans and sent his light cavalry under Brigadier General André Briche to take Mérida and leaving four squadrons of dragoons at Albuera to watch the garrison at Badajoz, he marched with the remainder of his army to invest Olivenza. Arriving on 11 January, Soult was confronted with a strongly garrisoned, but untenable, fortress. The heavy French artillery finally began to arrive on 19 January, and by 22 January, a poorly repaired breach in the fortress's walls had been reopened. The garrison surrendered on 23 January, with over 4,000 Spanish troops from the Army of Extremadura taken captive.