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
USSR anti-religious campaign (1921–1928) society. When such communities were discovered, the monastics could sometimes be immediately executed. Future church leaders were in these communities and they may have been instrumental in preserving monasticism in the USSR. Tikhon died in 1925. He was replaced in 1927 by Metropolitan Sergii who gave unqualified loyalty to the state. The Church, however, continued to teach that Orthodoxy was incompatible with Marxism. This was contrasted by many other religious groups in the country that tried to re-affirm how they were compatible with the state ideology when they were put under attack. The Patriarchal church lost its ability to train