World Battleground, 1000 years of war in 5 minutes
This animation shows all important battles that took place over the last ten centuries. The sizes of the explosions and labels are proportional to the number of casualties. The music is “Ride Of The Valkyries” by Richard Wagner. The data comes from the wikipedia article, List of Battles.
Most of the activity seems to happen in Europe, this is because the english wikipedia was used.