How did the pattern of constitutionalism, emerging from the American and French Revolutions, affect the course of events in the Western world during the first half of the nineteenth century?

The both nations France and USA called for unity to replace the old monarchy system of government, which lead to the civil war in France, fighting against the monarchy, economic struggle, and equal rights

Explanation:

The following events lead both countries to revolt against the Current system at that time. which are as follows.

Economic struggles: Both Countries found the taxation system unjust and unfair, they had to put a stop to it, through a revolution, Monarchy: Both Countries revolted against the monarch system, to get a better way to govern their countries better.