In 1800, First Consul Bonaparte and his ally, the Spanish minister Manuel de Godoy, ultimatively demanded Portugal, a British ally since the Anglo-Portuguese Treaty of 1373, to enter into an alliance with France in the war against Britain and to cede to France the major part of its national territory. After the Battle of Trafalgar in 1805, in which the Franco-Spanish fleet lost to Britain, the government of Portugal restored relations with its old ally. This led to the Peninsular War, in which France declared the Peace of Badajoz treaty cancelled, again marching on Portugal from 1807 to 1810.