In the 8th century the Buddhist master, Padmasambhava, who brought Buddhism to Tibet prophesied this...
I have my suspicions that it is recent hoax but havent researched it.
Interestingly, there is a similar Catholic prophecy from the 1800s that also gets accused of being non-authentic (at least part of it, but without proof), but the author of the non-disputed portion is a saint, literally. So I dont know what to think.
And there is always the Malachi prophecy referenced in my tag line which deals not with iron carriages and iron birds but a crusty and heretical old pope.
Aren't all prophecies denounced as hoaxes by someone? It does make it hard to believe any of them.
So I dont know what to think.
That states my POV on so many things! lol