From first to last: First Barbary war, embargo act, non intercourse act, battle of Tippecanoe, declaration of war 1812, USS Chesapeake incident, battle of put-in-bay, battle of lake champlain, treaty of ghent, battle of new orleans.
The last one should be the correct one
The correct answer is rapid industrialization
Those who had the wealth to enter the business got even more wealthy because they could exploit a system that wasn't yet monitored or regulated because it was new. Those who were simple workers became even poorer because their labor was being exploited by monopolies and cartels made by the wealthy businessmen.