On this Land Warfare episode, sponsored by American Rheinmetall, Dr Harlan Ullman, a retired US Navy captain, strategist and chairman of the Killowen Group consultancy, joins Defense & Aerospace Report Editor Vago Muradian to discuss the commentary he cowrote with General the Lord David Richards, Britain’s former chief of defense staff — “Porcupine for Putin: How Europe Can Defend Itself Against Russia” that appeared in The Telegraph — why a porcupine strategy; the four chokepoints that need to be defended to thwart a Russian invasion; Europe’s window of action before Russia rearms; the capabilities needed to deter Moscow; drawing lessons from Ukraine; prioritizing unmanned capabilities that can be developed quickly and fielded in volume; the long-range strike weaponry; the importance of abundant war stocks; and the the role of British and French heavy units as a reserve force.