I assume there is a graph or diagram you are not posting
Louis XVI´s decision to summon the estates-general prove disastrous because during it, the Third Estate , representing the Commoners decided to form a National Assembly, inviting the other two Estates ( Clergy and Nobility) to join them against the King. This is considered to be the start of the French Revolution.
Canada become a country when European's settled on the land. It was part of the British empire. There were many historical events in Canada. One of the most historical could be the burning of the White House in the War of 1812.
The Populist Party was important in United States history because it proposed ideas that later became law