Ukrainian underground maneuver raid 'Veles' near Kupiansk

The post describes Ukraine conducting an underground counteroffensive operation (“Veles”) near Kupiansk, moving ~15 km through subterranean communications to strike into Russian rear areas. It also claims the 2nd Corps 'Khartia' used its own technical solutions for underground communications, navigation, and life-support—indicating emerging doctrine and enabling tech for sustained underground combat in response to battlefield transparency.