Napoleonic Wars War of 1808–1814, assisted by Spanish guerrilla ('little war') tactics. Anglo-Portuguese forces under Arthur Wellesley supported the Spanish, which campaigned successfully against the French armies, eventually driving them from Spain and allowing Britain to invade southern France. By 1815, the British Army played the central role in the final defeat of Napoleon at Waterloo. Beyond minor naval actions against British imperial interests, the Napoleonic Wars were much less global in scope than preceding conflicts such as the Seven Years' War, which historians term a "world war". In response to the naval blockade of the French coasts enacted by the British
United Kingdom in the Napoleonic Wars threatened invasion of Great Britain itself, and with it, a fate similar to the countries of continental Europe that his armies had overrun. The Napoleonic Wars were therefore ones in which the British invested all the moneys and energies it could raise. French ports were blockaded by the Royal Navy. In 1803 the Kingdom of Great Britain was renamed the United Kingdom after absorbing Ireland. After a brief peace, in 1801-1803, war began again. Napoleon's plans to invade Britain failed due to the inferiority of his navy, and in 1805, Lord Nelson's fleet decisively defeated the French and Spanish at