(KYIV, UKRAINE) – Ukraine’s armed forces have prevented Russia from launching a large scale winter and spring offensive through extensive use of drone warfare, according to President Volodymyr Zelensky. Zelensky said Russia had prepared a major offensive intended to begin late last year and continue into spring. He said Ukrainian counter offensive actions disrupted those plans and prevented a large scale attack. He added that the outcome was driven not only by terrain and personnel but significantly by advances in…