While of ancient origin and being still relevant today, much is speculation about the military classic 'The Art of War' by Sun Tzu. Even the existence of the author is disputed. He allegedly served the state of Wu which ceased to exist 473 B.C., making his thoughts his only legacy. Anyway it originated in China and was adopted worldwide.
I'm quite curious as to when and where it was adopted first outside of China.
I'd mostly like to know that it found an audience, in that it was written about and present in the library of discerning readers. But I'll settle for translated and published, as these are easier to date.
I'm inclined to say this would have been Japan, being close by and having a thriving military tradition. But I could not find any reference.