The R-2 was a Soviet short-range ballistic missile developed from and having twice the range as the R-1 missile. Developed from 1946-1951, the R-2 entered service in numbers in 1953 and was deployed in mobile units throughout the Soviet Union until 1962. A sounding rocket derivative, the R-2A, tested a prototype of the dog-carrying capsule flown on Sputnik 2 in 1957. The same year, the R-2 was licensed for production in The People's Republic of China, where it entered service as the Dongfeng 1.

A short-range ballistic missile (SRBM) is a ballistic missile with a range of about 1,000 km (620 mi) or less. In past and potential regional conflicts, these missiles have been and would be used because of the short distances between some countries and their relative low cost and ease of configuration. In modern terminology, SRBMs are part of the wider grouping of theatre ballistic missiles, which includes any ballistic missile with a range of less than 3,500 km.