Soyuz 2.1a is a Russian launch vehicle that is part of the Soyuz family of rockets. It is designed to carry payloads into low Earth orbit and is known for its reliability and efficiency. The rocket features a three-stage design, with the first stage powered by four RD-107A engines, providing significant thrust during liftoff. The Soyuz 2.1a can transport satellites, cargo, and crewed missions to the International Space Station (ISS). It has been used for various missions since its introduction in 2004, contributing to both commercial and governmental space endeavors.