History is the one class in high school I wish I would have paid attention to, but I didn't, so I guess it's a good thing there is the internet.  Check out this video giving a history of the past 1,000 years of war on earth.

The first thing I've gotta say is, "We get it Europeans, you like war".  I mean honestly, that area of the map was exploding pretty much the entire time.  Things get kind of slow for a minute in this video, but it does a great job of showing the scale of both WWI and WWII.

 

Source: Fark.com