In October 1483, Henry Tudor launched a failed invasion of England from Brittany. Duke Francis II supported this invasion by providing 40,000 gold crowns, 15,000 soldiers, and a fleet of transport ships. Henry's fleet of 15 chartered vessels was scattered by a storm, and his ship reached the coast of England in company with only one other vessel. Henry realized that the soldiers on shore were the men of the new Yorkist king, Richard III of England, and so he decided to abandon the invasion and return to Brittany. As for Henry's main conspirator in England, Henry Stafford, Duke of Buckingham, he was convicted of treason and beheaded on 2 November 1483, way before Henry's ships landed in England. For Henry's conspiracy against King Richard III had been unravelled, and without the Duke of Buckingham or Henry Tudor, the rebellion was easily crushed.