The same goes for WWI. I'm not downplaying the horrors and scale of the Marne, Somme and Aisne, but the siege of Przemyśl, the battle of Lemberg were comparable

The same goes for WWI. I'm not downplaying the horrors and scale of the Marne, Somme and Aisne, but the siege of Przemyśl, the battle of Lemberg were comparable yet not nearly as infamous. When we think of WWI we think of the trenches in Belgium and northern France. Sure, Belgium was hit pretty hard (120,000 casualties, about 1,7% of population) but compare that to Serbia: 1 million casualties, a staggering 25% of population... and most people don't even realize that Serbia was affected by the war in the first place.