The Soyuz-2-1v (Russian: Союз 2.1в, Union 2.1v), GRAU index 14A15, known earlier in development as the Soyuz-1 (Russian: Союз 1, Union 1), is a Russian expendable carrier rocket. It was derived from the Soyuz-2.1b, and is a member of the R-7 family of rockets. It is built by TsSKB Progress, at Samara in the Russian Federation.