The Treaty of Versailles stated (to name a few) that Germany had to have a small army/navy/air force and couldn't try to expand their empire by taking over other countries, Hitler did this anyway, sparking WW2.
I believe the answer is democracy ^^
The Incas were an empire located in modern day <span>Peru. All the other choices were investigated in North America. Therefore, inca gold is your answer!
</span>
The sailed off from England, eventually landing in Cape Cod