Salyut 3

Salyut 3 was the operational Almaz military station also known as OPS-2. NASA's Russian space station history describes Salyut 3 as a first-generation military station, while Spacefacts records Soyuz 14 as the crewed mission that docked with it in July 1974. The Popovich-Artyukhin crew spent about two weeks aboard, carrying out station systems work, biomedical studies, and activities tied to the station's military reconnaissance role.