The IS-3, a heavy tank developed at Experimental Plant No.100 under the leadership of M. F. Balzha in 1944-45, was the latest Soviet tank developed in the course of the Great Patriotic War. The IS-3 was not used in any military action during World War II, but on September 7th, 1945 a tank regiment took part in the parade of Red Army Units in Berlin being dedicated to the victory over Japan. The tank was not considered an export model, although two machines arrived in Poland during 1946 while another machine arrived in Czechoslovakia with the purpose of familiarization and instructor training. A considerably larger number of tanks were sent to North Korea, which in the 1960's had two operational regiments of IC-3's. 100 IS-3 and IS-3M heavy tanks were delivered to Egypt from 1956 to 1967.