(Gene)First of all, your friend is incorrect. The earliest known fechtbuch, I.33 was written hundreds of years before Talhoffer and thus before these expeditions
Only about 10 years before Marco Polo's return from the orient -I wouldn't suggest that he brought back Eastern MA though but it should be remembered that the communication between East and West wasn't completely non-existant. Italians in particular traded with the Tartars who in turn ruled China -all before I.33.
Personnally I agree with the consensous that WMA and EMA went seperate ways, if parrallel, after the decline of the Hellenic world. But it is very hard to point to any medevil WMA texts as any sort of hard proof of this. IMHO. But I'm no historian so take that with a pinch of salt.

