I don't get the point, the author seems to make the point that double envelopment was not relevant by WW1. Guess what, it was relevant in WW2 and is still relev

I don't get the point, the author seems to make the point that double envelopment was not relevant by WW1. Guess what, it was relevant in WW2 and is still relevant today. The Reds were all about maneuver warfare in Russian Civil War and kept dreaming of it throughout the Cold War. A number of double envelopments has happened in the Ukraine war. When you're economically weaker the war of annihilation is your only bet.