Surely the French wars of Henry V aren't dynastic in any real sense. I think Shakespeare gets it exactly right when he has the Church cook up an unspeakable speech in the play about Salic Law, and how Henry therefore has an uncontested claim to the throne (virtually unplayable, and I once played the character who delivers it, so take it from me). It's all very nice, but surely Henry was off to the wars without it --- you have a French king sliding into bouts of insanity, and France resembles the pension fund of the Teamsters Union --- it's just SITTING there, waiting to be scooped up. I think the last time a credible dynastic reason could be advanced was by John, and it was barely credible even then. The York claim to the throne was about as good as the Lancaster claim, which is to say not very. Once Richard II is deposed it's more like "button, button, who's got the button?"
Simon