Okay, this migration has a little more uncertain path. It’s the migration of Elephants out of Africa. While the exact route is still unclear, this article at least helps us begin to map out their road.
The article is entitled “The Mammoth March: Paleontologist Are on the Fossil Trail of How Elephants Walked out of Africa“ by Brian Switek at Scientific American. At this point, there are still a lot of unknown variables.