That is so cool to learn about. My first exposure to war wagons was in AoE 3 [1] and I always wondered how a fortified wagon drawn by horse was somehow a counter to cavalry when you would theoretically just kill the horse and render the wagon useless (a mobility kill). Makes much more sense when you consider that a bunch of them are essentially a portable fort.

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[1] https://ageofempires.fandom.com/wiki/War_Wagon_(Age_of_Empir...