So there you go! According to this thesaurus, six of the seven tenets of bushido all mean the same thing.
Jokes on you because I do think that all seven tenets of the Bushido mean the same thing
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Even so, if those battles were typical, you still might have a point. But those battles are only remembered after so long because they were fluke victories that no one expected.
Well, the winning commanders expected victory, and they won through deliberately exploiting their own advantages while directly countering the enemy advantages. It is really just a question of competence.