Who did Genghis Khan invade?

When Genghis Khan was still called tie mu zheng he invaded many of the smaller tribes surrounding his, afterwards when he was called the great ruler he invaded and took over half of China, afterwards Genghis Khan started going west into the Arabic world where he eventually died.

Genghis Khan or Temujin as western history usually calls him, was one of history's great warrior leaders. He was every bit the equal of Julius Caesar or Napoleon.