Soyuz 18 was a crewed spaceflight mission launched on March 5, 1975, as part of the Soyuz program. The mission carried two cosmonauts, Viktor Patsayev and Oleg Makarov, to the Salyut 4 space station. The flight lasted for 7 days, 20 hours, and 42 minutes, during which the crew conducted scientific experiments and performed maintenance tasks. The mission is notable for its successful docking with the space station, despite a challenging launch sequence that included a partial failure of the rocket's engines. Soyuz 18 contributed valuable data to the ongoing development of space technology and human spaceflight.