The Ukrainian offensive under Kharkov was amazing not so much due to the fact that it was carried out, but about the effects it achieved. Ukrainian forces have been confronted before. In favorable tactical conditions, defenders were able to effectively attack Russian forces, e.g. close Kiev, where a amazing blow prevented the closure of the ringing of the lap around the city, a akin situation was erstwhile Russian units were pushed outside the state border north of Kharkiv. On the another hand, no of these actions were decisive for changing the situation at the strategical level, at most improving the tactical situation and entering into the definition of active manoeuvring defence - writes Colonel Rez. Piotr Lewandowski.