Or if you want some first hand observation. When I was a bit younger, there was this place called Vietnam (actually there were two of them at the time). The US army hired a bunch of black guys to go over there and steal Asian women and bring them back home to marry. Can't let the damn commies get the girls, so it was the US mission to stop them at all cost. Some of them were successful in carrying out their mission. Some of them are still together, although grey haired and grand parents now.
But I'm pretty sure that April 22nd, 4684 BC was the first time.
I've actually never seen an Asian girl with a black guy in person. I've only ever seen it online, and even then its rare. But i'm definitely into Asian women myself. For me, they tend to be the best women out there, because they're often less feminist, which removes that stifling atmosphere you often get with other women, making you more capable of being yourself. That being said, you probably would have to go to asia to find the kind of Asian women im talking about