 At the outbreak of the German-Soviet War the M1909/30 was still the most numerous 152-mm howitzer in Soviet service.On 1 June 1941, the RKKA possessed about 2,500 pieces, about twice as much as the newer M-10s, which were soon removed from production.Although from 1943 the M1909/30 was again being gradually replaced, this time by D-1, it was still in service by the end of the war.