As his conquests added state after state to the territory in which his word was law, Napoleon developed new tactics against England. He conceived it practicable to crush that commercial and manufacturing power by excluding her goods from the markets of Europe. This "continental system" was inaugurated in November, 1806, by the Berlin Decree which closed the ports of Europe to British vessels, and declared a paper blockade against the British Isles. This policy he forced upon nation after nation, to which his conquests extended. England retaliated by the "Orders in Council," which declared a blockade against the French ports, and authorized the seizure of neutral vessels found trading with them. By a naval raid in September, 1807, the British swooped down on Denmark and carried off the Danish fleet to keep that weapon from falling into the Emperor's hands. Two months later, in anticipation of a British descent, French armies seized Portugal and entered Spain. Up to the entrance of the French into the Spanish Peninsula, the protracted hostilities had brought little advantage to the British arms except on the sea. It was the Peninsular War, precipitated by this fresh encroachment of Napoleon, which first gave a laurel to the English arms and prepared Wellington for Waterloo. Napoleon and the soldier who was to overthrow him were born in the same year. The babe whom the world was to know as the Duke of Wellington was christened in Dublin in May, 1769, by the name of Arthur Wesley. (In 1798 the older spelling of the family name, Wellesley, was resumed.) He was descended from English ancestors long resident in Ireland, and was himself the fourth son of the Earl of Mornington. The death of the Earl when Arthur was but twelve years old left the family in slender circumstances. Richard, the eldest son and successor to the title, had achieved high university honors, but Arthur was a slow student of everything save music and mathematics. After a brief residence at Eton he entered a higher institution at Angers, in France. His mother thought him worth nothing better than "food for powder," and at eighteen he obtained a commission as ensign in the Seventy-sixth Regiment of British Foot. Family influence and the purchase of his "steps" soon made him a lieutenant- colonel (1793) of the Thirty-third Foot. He had already been three years a member of the Irish House of Commons where, however, he did not distinguish himself.