A lot of rocket/spaceship control systems and related components were designed and produced in Electrophibor in Kharkiv, East Ukraine. Yangel OKB, designers of

A lot of rocket/spaceship control systems and related components were designed and produced in Electrophibor in Kharkiv, East Ukraine. Yangel OKB, designers of the frankly speaking ridiculously overpowered R-36 ICBM series was in Ukraine (including work for turning R-36 into Tsyklon and Dnepr satellite launchers), as well as teams responsible for Zenit carrier rocket (also used as boosters on Energia). There was also other R&D and manufacturing works scattered across Ukraine, but outside of those and already mentioned Antonov they were mostly related to areas that weren't my hobby so I can't recite them from memory. Lots of heavy industry related to tanks and related vehicles near Kharkiv, at least. EDIT: Also, post USSR breakup Ukraine ended up having to run a nuclear "weapons" program despite disavowing nuclear weapons - because they had full chain nuclear weapons industry from raw materials to final warhead assembly, and it was considered good idea to keep those people employed lest they be hired out by more militant places.