The answer is World War I.
World War I started in 1914. This war caused citizens to revolt and overthrow corrupt governments in areas like Russia, where the Bolshevik Revolution took place during 1917.
World War I ended with the Treaty of Versailles in 1919. This punished Germany for the beginning of World War I. Along with Germany, several other countries were destroyed. Not only was their infrastructure destroyed, their economy was suffering as well. This all helps lead to the rise of fascism.
Spain was the European country that colonized Mexico and southwestern US
French involvement in the American Revolutionary War of 1775–1783 began in 1775, when France, a hotbed of various radical Enlightenment ideas and long-term historical rival of the Kingdom of Great Britain, secretly shipped supplies to the Continental Army when it was established in June 1775.
The United States used the sinking as propaganda to get the country on board for war
They supported the union with supplies and ammounation
