Rail transport in the Soviet Union the Soviet Union collapsed. Twenty other stations were under construction in 1985. The country's rapid transit system was the most intensively used in the world. The Soviet Union was a pioneer in the development of the diesel locomotive to replace the steam locomotive (dieselization) on non-electrified lines. But the USSR failed to make steady progress and while they lead the United States at first, they soon fell behind and their last steam locomotives were retired about 15 years later than for the US. The first mainline diesel locomotive in the world began running in 1924 in the USSR but it
1991 in the Soviet Union 1991 in the Soviet Union The following lists events that happened during 1991 in the Union of Soviet Socialist Republics. The Soviet Union had a transitional government in 1991, during the fall of communism. Every republic in the union had growing nationalism until Christmas of 1991 when Mikhail Gorbachev, the General Secretary of the Communist Party of the Soviet Union and President of the Soviet Union, abandoned the Union at the time of its dissolution. The dissolution created huge changes in politics and territorial claims. NATO scaled back its presence following the dissolution. January Events (Lithuania) Soviet Union referendum, 1991