Dave and Accelerated, the webmaster of this website http://www.angelfire.com/hi/Azgaser/ had written an article years ago about the Armenian origin of the two wheeled, standing platform war chariot pulled by one or two horses. This unit has a name, but I don't recall what it is. Anyway, from what I remember of the article, this effective and highly mobile military unit had Armenian or proto-Armenian origins.
If you email him I"m sure he may be able to give you more information on his sources. In fact I'm sure I have a copy of that article somewhere--meaning I'd have to do a lot of digging to find it. So if you can't get any info from him, let me know and I'll try to find it.
Obviously, other similar chariots existed previous to this one, but I belive there was some specific innovation, which markedly increased its effectiveness, that was traced to Armenian origin.
This is just some picture I found on the Internet, But I believe it looked something like this: