How to beatHouse of Lancasteras French

Against a composition of crossbows and spears, you'd still prefer archers over Arbalétrier; there are very few armored units, so Arbalétrier lose a lot of value.

It's always difficult trading up against Yeomen with your normal archers because they move so much quicker.

Out of every men-at-arms variant in the game, I think Earl's Guard should technically be the best ones against knights, especially from an age ahead. With those you just need to kite back and not wait too long before the next dagger is ready.

Synchronized Shot (Yeoman ability) is effective against clumped groups of French archers.

Without Essence of the King, demilancers don't pack the punch needed against French knights.