2,700-year-old leather armor proves technology transfer happened in antiquity
sciencedaily.com
sciencedaily.com
For example, two-wheeled light military chariots probably originated in Central Asia with the Sintashta culture around 2000 BCE, and spread from there to everywhere from Egypt to East Asia.
In addition, though I dunno if you want to consider it a technology transfer, their particular horse breeds, bred to drive those chariots, also spread to the extent those breeds are the ancestors of every living domestic horse (https://www.nature.com/articles/s41586-021-04018-9)
We now know that there were two people, a shock troop and a horseman, who served in the same Assyrian imperial army at or around the same time. Then after they retired from the army, one stayed in the region, and the other moved to China.
It's pretty clear (or seems so) that the armor in the Met came from there, but the Met doesn't seem to have a definitive source for it.
I could have read it wrong or misunderstood, but I've been reading a lot about ancient history and they seem to value items found in-situ with context over ones that surface after they've been discovered without context.
But now we have the opposite problem... there is so much good information and technology out there, yet we're often not able to effectively use it. (What, another failed infrastructure / IT / software project? Don't we know how to make those?)
Our collective ego has gotten so big, we often lack the humility to say, "Wait, I need to see who has the best technology / method in this area", and then learn it and apply it.
Sure it spreads, but it spreads by the nature of warfare and/or commerce more than anything else.
In fact, that this person was buried with a piece of technology that predates defensive technology available in the area shows how selfish or superstitious they were.
I find it unsurprising that military technology was transferred so easily in this medium.