I recommend the following video by CGP Grey, largely based on the book "Guns, Germs and Steel" by Jared Diamond:
<a href="https://www.youtube.com/watch?v=JEYh5WACqEk" rel="nofollow">https://www.youtube.com/watch?v=JEYh5WACqEk</a><p>Now, history doesn't give a lot of merit to natives. The largest battle in the Americas, the siege of the Aztec capital Tenochtitlan, was won with the help of 80,000 to 200,000 Tlaxcalan natives, which amounted for 99% of the infantry used.