Strength of Arms
I'm in disagreement with @Blackbeard @Owl Ki @Admiral Lee Hung on the idea that the Tiger of Chu would be wasting time dealing with a minor general (which is what Man'U was regardless of his abilities) when he's out leading grand armies in the East + dealing with the Wei7/Zhao3/Qin6/Gakuki.
“Hey, Kou En Sama, another one of those Generals from a state we just absorbed is marauding across Chu.”
“Okay, send his own people to fight him like we did for all the others. That should break him in.”
^Thats could be the extent of Kou En’s involvement if he was involved with ManU and co lol. Shunshinkun is more of a political mind than he is a tactical warrior mind.
But Kou En to me seems like one of those Generals with an eye for small details like Ouki talked about. The one and only quote we know from Kou En, was when Ren Pa stated that “Chu has yet to take advantage of all the resources at its disposal”, and then immediately attributed that idea to Kou En lol. Which makes Kou En sound like the exact type of General who would concern himself with “small” details like ManU and co.
This idea that Great Generals only focus on larger battlefield details is weird to me. In fact, the best Generals seem to be the ones who do have eyes for small details on the battlefield. Riboku is the greatest General of this era because he devotes himself to understanding the minor details on the battlefield. Generals like Fuuki who focus on nothing but the greater battlefield tend to get bodied by ones who focus on minute details like Ouki.
So Kou En, as Chu’s strongest General, should be someone who pays extremely close attention to the small details of Chu and the affairs of its military.