1404 - Red remembered rebels

From 1400 to 1404
The Welsh rebellion gathered pace each year
Led by the venerable Owain Glyndwr
And family, and Edmund Mortimer
A rival to England's Henry IV
Who, after the Welsh secured his capture
Married one of Owain's lovely daughters
And joined the fight against Henry, whose poor
Mental state didn't help matters of war
His son, of course, won big at Agincourt
Against the French and Bretons, whose boats tore
Into the ports on England's southern shore
Supporting Owain's challenge to the law
Of the English, lasting ten years or more