The Flower of Battle: Italian Fighting Manual (1410)
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publicdomainreview.org
Other historic fencing manuals like this can be found at https://wiktenauer.com
https://youtube.com/playlist?list=PL2AcjEcWawSm_rc8F_bLu50aP...
1) https://en.wikipedia.org/wiki/Historical_European_martial_ar...
that said, how to train the AI? robot to human test battles are very limited in training set size, so it would have to be AI robot vs. AI robot. that would probably yield a strategy very close to the style of the AlphaGo/zero/*: very conservative, maximizing the space of winning scenarios, winning each one with as little of an advantage as necessary.
edit: i've got not the slightest clue about sword fighting (except that it doesn't look like in the movies), so i could be completely off the mark here.