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 face of increased allied resistance under the command of Arthur Wellesley, Marquess of Wellington.