In the siege of Pamplona, a Spanish force led by Captain General Henry O'Donnell and later Major General Carlos de España blockaded an Imperial French garrison under the command of General of Brigade Louis Pierre Jean Cassan. At first, troops under Arthur Wellesley, Marquess Wellington surrounded the city, but they were soon replaced by Spanish units. In late July 1813, Marshal Nicolas Soult attempted to relieve the city but his operation failed in the Battle of the Pyrenees. Cassan capitulated to the Spanish after the French troops in the city were reduced to starvation. The surrender negotiations were marred by French bluffs to blow up the fortifications and Spanish threats to massacre the garrison, neither of which occurred. Pamplona is located on the Arga River in the province of Navarre in northern Spain. The siege occurred during the Peninsular War, part of the Napoleonic Wars.

The Battle of the Pyrenees was a large-scale offensive launched on 25 July 1813 by Marshal Nicolas Jean de Dieu Soult from the Pyrénées region on Emperor Napoleon's order, in the hope of relieving French garrisons under siege at Pamplona and San Sebastián. After initial success the offensive ground to a halt in the face of increased allied resistance under the command of Arthur Wellesley, Marquess of Wellington. Soult abandoned the offensive on 30 July and headed toward France, having failed to relieve either garrison.