...As Shakespeare tells us.

True, the civil wars didn't breakout properly for some years but remember Henry disposed Richard 2nd 'to his own satisfaction'.

Henry of Lancaster was elected king by Parliament as Henry 1V but in 1400, Rihcard was murdered at Pomfret. It's my interpretation Richard II was the first victim of the War of the Roses. -And wondering why JA started her History at this point.

Actually, I think the trouble of Edward III having eleven legitimate children was by marryiage they created semi-royal families giving too many future claimants and pretenders to the throne. At a time when nobles kept private armies, not always a good thing for civil peace!