Buckingham's rebellion was a failed but significant uprising, or collection of uprisings, of October 1483 in England and parts of Wales against Richard III of England. To the extent that these local risings had a central coordination, the plot revolved around Henry Stafford, 2nd Duke of Buckingham, who had become disaffected from Richard, and had backing from the exiled Henry Tudor (the future king Henry VII), and his mother Margaret Beaufort. Seven ships from Brittany carrying over 500 Bretton soldiers, Henry Tudor, and many of his supporters were to have simultaneously rise against Richard III. A gale ended their dream, and in England, a premature uprising in Kent forewarned Richard that Buckingham had changed sides.
Buckingham's precise motivation has been called "obscure"; he had been treated well by Richard. The traditional naming of the rebellion after him has been labelled a misnomer, with John Morton and Reginald Bray more plausible leaders.
Rebels took arms against the king, who had assumed power from Edward V in June of that year. They included many loyalists of Edward V, and others who had been Yorkist supporters of his father Edward IV.
Preparations, however, did not live up to the broad base of the rebellion: Richard in the field defeated the rising in a few weeks. In those military terms it was a complete failure. However, it deepened many people's opinion about Richard as king, and its effect over the next few months was to drive a number of leading figures into Henry Tudor's camp. 500 Englishmen slipped the King's net and found their way to Rennes, the capital of Brittany, who, in desperation, forged an alliance with the unknown Welshman, Henry Tudor.