Factory Number 24, at Kuybyshev Oblast produced a quarter of all aviation engines in the Soviet Union and 85 percent of all Ilyushin Il-2 engines, Factory Number 26 at Ufa, with 31 percent of total production and 60 percent of all fighter aircraft engine production, Factory Number 16 at Kazan, producing 12 percent of the total and 60 percent of all medium bomber aircraft engines, Factory Number 45, in Moscow, with five percent total but 15 percent of IL-2 engines, and finally Factory Number No. 466 at Gorkiy with five percent total and one-tenth of all fighter engine production were the targets. Three of the five ball bearings plants were in range, the synthetic rubber plant at Yaroslavl (23 percent of output) and oil refineries along with steel plants were all considered. Surviving intelligence maps show the crude oil and ball bearing plant at Saratov was also considered. In the end phase, the production of tanks and armoured vehicles received the weight of the attacks. The facilities at Gorkiy drew most attention for it produced 15 percent of T-34s and was the largest plant west of the Urals. In error, planners targeted the State Motor Vehicles Plant No. 1 Molotov, the largest automobile plant in the country which produced the less threatening T-60 and T-70. The Krasnoye Sormovo Factory No. 112 was targeted because of its production of munitions.