Going underground: Ukraine's subterranean fighters highlight the benefit -- and long history -- of tunnels in warfare
- Written by Paul J. Springer, Professor of Comparative Military Studies, Air University

Faced with the prospect of sending Russian troops into subterranean combat, Vladimir Putin demurred. “There is no need to climb into these catacombs and crawl underground,” he told his defense minister on April 21, 2022, ordering him to cancel a planned storming...