Combat work of 30th Separate Mechanized Brigade?s artillerymen in Donetsk sector

war Russian-Ukrainian war military service artillerymen artillery 30th Separate Mechanized Brigade named after Prince Kostiantyn 30th Separate Mechanized Brigade combat mission gun crew Donetsk region 2S3 Akatsiya self-propelled artillery 30th Separate Mechanized Brigade Prince Kostiantyn Ostrozkyi shell signing combat mission Donetsk direction Ukraine Viacheslav Madiievskyi Ukrinform NurPhoto August 13 2025 military unit artillery gunner mechanized brigade Ukrainian military artillery preparation Donetsk region Eastern Ukraine military operation artillery shell combat readiness military personnel artillery vehicle Ukrainian defense artillery mission military equipment Ukrainian forces artillery brigade military photo combat zone military action.