The American Civil War was a watershed event in United States history causing years of war and terrible destruction, but also signaling the last time an individual state ever seceded, and more importantly, the end of slavery. World War I was to be the “war to end all wars” due to the never-before-seen destruction it unleashed, but by 1939, the world was at war again, dragging even more countries into conflict and causing even greater turmoil. Major battles, methods and weapons of war, final outcomes and the wars’impact on and significance to the world today are all explored.