The Soyuz (Russian: Союз, meaning "union", GRAU index 11A511) was a Soviet expendable carrier rocket designed by OKB-1 and manufactured by State Aviation Plant No. 1 in Samara, Russia. It was used to launch Soyuz spacecraft as part of the Soyuz programme, initially on unmanned test flights, followed by the first 19 manned launches of the programme.
The Soyuz first flew in 1966, and was derived from the Voskhod rocket, it was a member of the R-7 family of rockets. It was a two-stage rocket, with four liquid-fuelled strap-on boosters clustered around the first stage, with a Block I second stage.
Soyuz rockets are assembled horizontally in the MIK Building at the launch site. The rocket is then rolled out, and erected on the launch pad.