Owain Glyn Dŵr is a towering figure in Welsh history, best known for a revolt against the English crown in the early years of the fifteenth century. Despite facing overwhelming odds, Owain was successful enough, for a time, to re-establish native rule in a Wales deemed to have been conquered over a century previously. The rebels proved to be surprisingly capable opponents during the ensuing conflict. Militarily, their campaigns were well-planned and more efficiently executed than those of the better equipped and highly-regarded Crown troops, who heavily outnumbered the rebels....