Imperialism is the growth or building if an empire. Some reasons for imperialism is for more land=money=power, refuling stations, military bases, other nations are doing it, and markets.
Idk if this is the event its asking for but: The “Red Summer” of 1919 marked the culmination of steadily growing tensions surrounding the great migration of African Americans from the rural South to the cities of the North that took place during World War I.
The major downfall of the Articles of Confederation was simply weakness. The federal government, under the Articles, was too weak to enforce their laws and therefore had no power. The Continental Congress had borrowed money to fight the Revolutionary War and could not repay their debts.
Hope this helped! :)
The 2 1916 battles would be The Battle of Marne and The Battle of Verdun