Skirmishes like the one involving the Frankenstein tank, highlighting the power of drones, have prompted a roiling debate among senior Russian military officers, military bloggers and other analysts about how the war is being waged. The discussion comes as Russia finds itself locked in a war of attrition in Ukraine, and touches on a broad array of military issues including equipment, training and, most of all, tactics. Many are asking whether Russia has adapted effectively to the way drones have transformed the battlefield.