As top Russian and Ukrainian generals assess the        battlefield after nearly two brutal years of stalemated        positional warfare, they draw the same lessons: Tanks,        manned aircraft and traditional maneuver forces are sitting        ducks, while advanced drones and digital battle-management        systems can have a decisive impact.      
        Russia has come to realize what Ukraine recognized more than a        year ago: This is an algorithm war, one where digital        intelligence and targeting systems have rewritten the rules        of conflict. The fog of war experienced by commanders for        centuries has cleared. In the newly transparent        battlespace, movements by large units are instantly visible        and vulnerable.      
      This look into Russian and Ukrainian military assessments is      possible thanks to commentaries published in the past two      weeks by two veteran commanders, Gen. Yuri Baluyevsky, a      former chief of the Russian general staff, and Gen. Valery      Zaluzhny, head of the Ukrainian military. They appeared,      respectively, in Army Standard, a Russian publication, and      on the website of the Ukrainian defense ministry.    
      The commentaries were flagged to me by Kevin Ryan, a retired      Army brigadier general who served as U.S. defense attach in      Moscow and then taught at the Harvard Kennedy Schools Belfer      Center. He translated the articles and circulated them this      week among Russia specialists. Zaluzhny made similar comments      about the importance of drones in an interview published in      November in the Economist, but the Russian analysis      is new and startling.    
      These two adversaries see many of the same lessons, Ryan      writes in an email summarizing the commentaries. The generals      recognize that in the Ukraine battlespace, no concentration      of troops, large or small, can escape the ever-present      reconnaissance by unmanned aerial systems and satellites, he      notes.    
      The tactical revolution underway in Ukraine underlines why a      congressional failure to approve continued U.S. military      support for Kyiv would be so devastating. As Russia gains      increasing mastery of digital warfare, Zaluzhny worries that      Ukraine is hobbled by exhaustion of our partners stocks of      missiles and ammunition and the difficulty of our allies in      determining the priorities of support.    
      Baluyevskys comments read like a wake-up call to his fellow      Russian officers. He argues that the so-called special      military operation in Ukraine has been an unprecedented test      of literally all components of military affairs and military      construction. His analysis came in the foreword for an      anthology of essays about the war, which was then summarized      in Army Standard by Russian journalist Sergey Valchenko.    
      Baluyevsky echoes many Western commentators who have argued      that defense has trumped offense in Ukraine. Air defense has      won an unexpected triumph over military aviation, which has      lost the ability to operate en masse over enemy territory      and even must fly with caution over its own territory.    
      The tank has become one of the main casualties of the combat      experience of the last two years, he explains, since it was      an easily detected and easily hit target and turned out to      be very vulnerable to mines. Similarly, the impossibility      of concentrating troops  forces us to conduct combat      operations with small units and separate combat vehicles.    
      Baluyevsky has some scathing comments about the performance      of Russian weapons. The qualitative superiority of NATO      artillery is evident, he contends. Ukraine has revealed a      significant lag in Russian artillery and missile systems and      requires their priority radical rearmament in the next few      years.    
      The winners in this war are drones. Unmanned aircraft have      rapidly and unconditionally conquered the airspace,      Baluyevsky argues. Zaluzhny agrees that unmanned systems,      along with other new types of weapons, are almost the only      tool for getting out of the stalemate of trench warfare.    
      Zaluzhny bemoans Russias manpower advantage and Ukraines      inability  to improve the state of staffing of the Defense      Forces without the use of unpopular measures, such as a      nationwide draft. His disagreement with President Volodymyr      Zelensky about the need for such an all-out mobilization is      one reason for recent tension between the two men  and      Zelenskys reported readiness to sack his commander.    
      Ukraine, as I wrote after visiting Kyiv in October,      is exhausted by war and slowly bleeding out. Zaluzhny      implicitly recognizes this war fatigue in arguing for      increased use of unmanned systems to reduce the level of      losses  reduce the degree of participation of traditional      means of destruction  [and] limited involvement of heavy      equipment.    
      The lesson for the United States, beyond the simple but      urgent need to continue military assistance for Ukraine, is      to focus that support on the high-tech weapons that matter.      The weapons that have generated endless debate, such as tanks      and F-16 fighters, are less important than drones,      antiaircraft systems and electronic-warfare jammers.    
      The best weapons today, agree the Russian and Ukrainian      generals, might be small, cheap systems such as first-person      view, or FPV drones that fly into targets like tiny suicide      bombers and can be almost impossible to stop. The chilling      fact is that these silent killers can be bought and used by      almost any combatant, anywhere on Earth. It is, as the      generals agree, a new day in warfare.    
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Opinion | What a Russian and Ukrainian general agree on: This battlespace is different - The Washington Post