ign bureau (KBTM) produced T-80 tanks from the 1970s, and were responsible for the BTR-T, TOS-1, and the prototype Black Eagle tank. Omsk Transmash declared bankruptcy in 2002.
In the 1950s, following the development of the oil and natural-gas field in Siberia, an oil-refining complex was built, along with an entire "town of oil workers", expanding Omsk northward along the Irtysh. It is currently the largest such complex in Russia. Gazprom Neft, the parent company, is the largest employer in the city, wielding its tax address[clarification needed] as leverage in negotiations with municipal and regional authorities.
Post-Soviet period
Following the dissolution of the Soviet Union, Omsk experienced a period of economic instability and political stagnation. Most of the city's large businesses, which had previously been state owned, were fought over by members of the former party elite, the emerging nouveau riche, and fast growing criminal syndicates. The most notorious cases involved the privatization of Sibneft, a major oil company, which dragged on for several years. Until the end of the 1990s, political life in Omsk was defined by an ongoing feud between the oblast and city authorities. The resulting conflict made at least two points of view available to the public and served as the impetus for some improvements to the city's infrastructure and cultural life. These included the construction of new leisure parks and the renovation of the city's historic center, the establishment of the annual Siberian International Marathon, and of the annual City Days Festival. Despite this, internal political competition drained the Omsk's resources and served as a major obstacle for smooth government operations and city development. The conflict was finally resolved in favor of the oblast government, with the forced resignation of two consecutive mayors and the subsequent de facto appointment of their successor by the Governor of the oblast. Since the
