During World War I, Britain and France were allies thanks to the Entente Cordiale of 1904. Despite centuries of conflict, they joined forces against Germany. Before 1900, Britain saw France as a major threat, but after the Entente, they began planning joint operations. By 1911, Britain was committed to supporting France in case of war with Germany. These plans were mostly kept secret and conditional. The alliance between Britain and France was crucial for their victory in the war.