The Forty Days Campaign, also referred to as the Conquest of England, was a military invasion orchestrated in May and June of 1815 by Napoleon Bonaparte of France against the British Empire, led at this point by the Lord Neville, commander of the remaining British Forces. Beginning with the Landing at Southhampton on May 21st, 1815 and ending with the surrender by King George III at York on June 30th, the campaign lasted exactly forty days.