Russian units have launched more than 1,800 airstrikes on Ukraine since the Russian invasion began exactly a month ago, Kiev says. In addition, hundreds of missiles have been fired at Ukrainian targets from land and sea, including 175 Iskander missiles and 183 Kalibr missiles, the Ukrainian Defence Ministry says. According to the Ukrainian general staff, however, the Russian troops are suffering from enormous supply problems. In addition, several arms producers in Russia have been forced to stop production in part or in whole due to the consequences of Western sanctions on Moscow. Almost 16,00…