Although primitive naval blockades had been in use for millennia, the first successful attempts at establishing a full naval blockade were made by Admiral of the Fleet Edward Hawke during the Seven Years' War (1754–1763). Following the British naval victory at Quiberon Bay, which ended any immediate threat of a major invasion of the British Isles, the British implemented a tight economic blockade on the French coast. This began to starve French ports of commerce, further weakening France's economy. Hawke took command of the blockading fleet off Brest and extended the blockade of the French coast from Dunkirk to Marseilles. The British were able to take advantage of the Navy's position to develop plans for amphibious landings on the coast. However, these plans were eventually abandoned, due to the formidable logistical challenge this would have posed.