Uhm, don't be so quick to assume that. The first world war wasn't quite as you've heard. The front line was very dynamic in some parts (n the summer of 1915, R

Uhm, don't be so quick to assume that. The first world war wasn't quite as you've heard. The front line was very dynamic in some parts (n the summer of 1915, Russia lost an area an area around half as big as today's Ukraine). It was static in some areas, notably the small areas of the western front where the troop and supply density was enormously high. The German attack at Verdun was just 40km wide, the Russian invalsion now is a >1000km front. During that battle, the Germans committed more soldiers to attacking a single village than the total size of the Russian army now. Maybe you could say that those sections were kept static by extreme resource use, rather than by lack of anything.