Well my biology lessons told me that we used to be hominids but I am not hundred percent sure its right.
Farmers faced Native American raids, poor growing conditions, droughts, disease, insects, and anything that would give farmers a hard time now. Farmers had to pay higher prices for transportation which caused less profit - crops prices fell which also caused less profit. The government issued greenbacks then retired them, causing an increase in the value of money in the circulation.
Answer:
World War I changed the way wars were fought because of the widely known trench warfare. Because troops inside the trenches were much more protected than troops outside, it led to much more prolonged battles.