Predictions that megacities will be the battlegrounds of the future have led to massive U.S. Army spending on training efforts for subterranean warfare. In 2017, the Army spent $572 million to train and equip 26 active combat brigades in ‘large-scale subterranean facilities that exist beneath dense urban areas around the world.’ These battlegrounds pose unique communications, logistical, tactical and strategic problems that the Army has already faced most recently in its underground operations in Syria, Iraq, and Afghanistan.
Source: Army Is Spending Half a Billion to Train Soldiers to Fight Underground | Military.com
