The united states had ties to many other economies in the world, when the U.S economy collapses in 1929, the world is sent into the depression, which Hitler used to his advantage, thus causing the raise of Fascism in the 30's thus resulting in WW2. Unemployment rates skyrocketed when the unemployment occured, banks failed, etc.
Is this question from that one book Shiloh like the begal dog if so I might no the answer
they told them that they could carry them out
The Incan civil war weakened the empire exhausting its resources and killing its fighters, thus leaving the door open to conquest by the Spanish
With their far greater numbers, they might have repelled the European forces meaning that they could have retained control of the continent
He followed the advice of Arius Didymus who told him that "Too many Caesars is not good". (no joke I swear he actually said that) Hope this helps ;)