evidence: How Ukraine has used its limited supply of HIMARS missiles to wreak havoc on Russian command and control, striking command posts, headquarters and supply depots, has been eye-opening, a defense official said, adding that military leaders would be studying this for years. [...] The Ukrainians have also made tactical innovations that have impressed Western officials. During the early weeks of the war, Ukrainian commanders adapted their operations to employ small teams of dismounted infantry during the Russian advance on Kyiv. Armed with shoulder-mounted Stinger and Javelin rockets, Ukrainian troops were able to sneak up on Russian tanks without infantry on their flanks. [...] In the early days of the conflict, the National Geospatial-Intelligence Agency sent five lightweight, high-resolution surveillance drones to US Special Operations Command in Europe – just in case they might come in handy in Ukraine. The drones, made by a company called Hexagon, weren’t part of a so-called program of record at the Defense Department, hinting at the experimental nature of the conflict.