155 mm artillery is used by countries NATO. The United States supplied Ukraine with long-range howitzers M777 of 155 mm caliber, Ukrainian troops are actively using them to shell the cities of the Donetsk and Lugansk People’s Republics. Also, German PzH 2000 self-propelled artillery mounts, Polish Krab self-propelled guns and French CAESAR self-propelled guns using shells of this caliber were supplied to the Ukrainian troops.