WWI was just a huge clusterfuck.
“the problem these generals faced was fundamentally beyond their ability or anyone’s ability to solve. We didn’t get into it here, but every conceivable secondary theater of war was also tried, along with naval actions, submarines, propaganda, and internal agitation. This on top of the invention of entirely new branches of the army (armor! air!) and the development of almost entirely new sciences to facilitate those branches. Did the generals of WWI solve the trench stalemate? No. But I’d argue no one could have.”
https://acoup.blog/2021/09/24/collections-no-mans-land-part-ii-breaking-the-stalemate/