Peter talks to Prof John Spencer, doyen of Urban Warfare at West Point, after his recent trip to Ukraine. They cover the Battle of Kyiv, urban terrain as a warfare discipline, the peri-urban, phone-a-friend intelligence, the precision paradox, the failures of John Boyd's theories, and the admirable ability of the Russian army to break contact and retreat under fire. As both parties in this Ukrainian-Russian war prepare for the next phase of violent action, Peter and John try to deternmine what will be critical in the outcome of the campaign: momentum and resistance being key facets to any material capability.