The British 1st Division was originally formed in 1809 by Arthur Wellesley, 1st Duke of Wellington for service in the Peninsula War, drawing initially from two British brigades and one Hanoverian brigade of the King's German Legion. During the Peninsula War, it was involved in most of the engagements between the Allies and France including the Battle of Talavera in 1809, the Battle of Salamanca in 1812, the Siege of Tarragona in 1813, the Battle of Vitoria in 1813, the Siege of San Sebastián in 1813, the Battle of the Pyrenees in 1813, the Battle of the Bidassoa in 1813 and the Battle of Toulouse in 1814.