It's a 100 year since World War I. The Great War YouTube channel goes through the war week by week. So far there are 160+ videos.
In 1916, we will see the great battles - Verdun, Somme, the Brusilov offensive. Together they will cause somewhere around 4,000,000 causalties - that's roughly tree times as many causalties as in the American Civil War. Small wonder that the phrase after WWI was "Never Again" (yes, that precedes the use of the term for the Holocaust).