Armour replaces heavy cavalry of yore. It's a halfway between a highly mobile (light infantry) and defensible posture. But armour is itself vulnerable. One has

Armour replaces heavy cavalry of yore. It's a halfway between a highly mobile (light infantry) and defensible posture. But armour is itself vulnerable. One has to remember the chess analogy is quite powerful, each capability is _against_ some other enemy capability but _only_ within some context. Armour without infantry and anti-air support is useless. What Putin has used is the "Armoured Assault", not really effective since Germany's Panzerwaffe. It's the tactic not the equipment that's out of date. From [1] > circa 1934: "Basil Liddell Hart, now concluded that the defense had become much the stronger form of war and that armoured offensives would come to grief against a properly organized enemy." [1] https://www.britannica.com/topic/tactics/The-armoured-offensive https://www.britannica.com/topic/tactics/The-armoured-offens...