This is incredible. Check out this animation showing 1,000 years of war worldwide — in five minutes. Pay special attention to what happens in Europe in the 1930s. Denmark-based Jodi Colomer did a great job putting this startling animation together.
The sizes of the explosions you see — and the sizes of all the named battles — are proportional to the number of casualties in each conflict.
Thousand Years of War animation via: Jodi Colomer
The data in this animation is visualized from this Wikipedia article.