On 16th September 1400, Owain Glyndŵr was proclaimed Prince of Wales and proceeded to attack Ruthin. His revolt lasted 15 years; this may not seem that shocking now, when experts expect counter-insurgency wars to last a decade, but few revolts in contemporary Europe lasted more than a few months. For some of that time he controlled almost all of Wales beyond the English castles, secured the support of a French expeditionary force, held the first — and only — Welsh parliaments, and corresponded as an equal with the kings of France and Scotland. At one point, the kingdom of Henry IV seemed about to be torn into three, but by 1408 only a fragmentary guerilla struggle remained.
Nothing is known of Owain after 1412. He was never captured, and despite enormous rewards being offered he was never betrayed, unlike so many other Welsh princes. He was offered pardons but never responded: of course, he may have alreay died. One tradition has that he retreated to the Scudamore estate at Kentchurch (Owain’s daughter, Alys, had married Sir Henry Scudamore, the Sheriff of Herefordshire); if so then this was probably some informal accomodation.
Very many said that he died; the seers maintain he did not. (Panton MS 22)
And therein lies his power.