Perkin Warbeck was an impostor of a pretender to the throne of England. Nonetheless, he was still a significant threat to the rule of King Henry VII of England. By saying he was really Richard of Shrewsbury, Duke of York, Warbeck took on the mantle of someone with a much better claim to the throne than Henry. Richard was the younger brother of Edward V, and both boys were locked in the Tower of London by their uncle, who would become Richard III. No one knew what happened to them, which became a bigger problem when Henry Tudor, with a distant claim to the throne, killed Richard III at the Battle of Bosworth Field. Henry VII would begin to consolidate his power, but he still had a number of threats from people loyal to his enemies. This gave Perkin Warbeck an opening. Claiming to be the Duke of York in a number of European courts, Warbeck gathered support from a number of important people. Beginning in 1495, Warbeck launched a series of invasions with Flemish troops, Scottish troops, and Irish troops. Eventually, he was captured in 1497, wrote out a fully confession, and was held at court. He was still in a tenuous position, and when he tried to escape confinement, he was sentenced to death and hanged at Tyburn hill in London.