The D-20 gun-howitzer was developed shortly after the end of World War II by the F. Petrov Design Bureau; it was intended to replace the pre-war 152 mm ML-20 howitzer (M1937).
The D-20 gun-howitzer was developed shortly after the end of World War II by the F. Petrov's Design Bureau OKB-9 in Yekaterinburg. It was intended to replace the pre-war 152 mm ML-20 howitzer (M1937).