Ok, James Monroe came up with the monroe doctrine to keep foreign countries out of our territories. he basically said that if any other country came into our land without permission it would be considered an act of war. Hope this helps :)
Stars and stripes
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The French Revolution sparked a branch which grew into a flame. Neighboring people to France saw this uprising as a time of opportunity and change. In a sense the French Revolution opened the flood gates for revolutions all across Europe which led to more power to the people, but also involved a lot of bloodshed