Old shells and rockets supplied to Ukraine by the allies can damage equipment and injure fighters. The New York Times calls this problem.
In addition, ammunition is in short supply. Ukraine receives different ammunition from different countries, their shooting accuracy is different. Because of this, more means have to be used to hit targets. “Now this is a very big problem,” Alex, the commander of one of the Ukrainian battalions, told the publication. Earlier, Jack Watlin, a senior researcher at the Royal Joint Institute for Defense and Security Studies in the UK, said that the Ukrainian military did not have time to complete a full-fledged training course with Western instructors, which affected the course of the counteroffensive. He points out that the West delayed the start of training of the Ukrainian military, thus making a mistake, and the Russian side received time to strengthen the defense line, making the task of the enemy more difficult.