Spears and Earl's Guard. Perfect counter up against the Knights.
As House of Lancaster, you can go for six manors and look to play that feudal age. You can't exactly go fast castle with three manors; you're definitely going to die. But with six manors, I think you can get away with that and mount the defense pretty comfortably if you macro effectively in the early game.
Against French knights, prioritize the Collar of Esses upgrade before other unit upgrades to counter them effectively.
Knights in combination with spears is definitely going to work wonders against the French composition.
Going for King's College and Essence of the King (for +6 damage vs knights) is very strong against French knights and archers.
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