The Soyuz 3 spacecraft achieved the first Soviet space rendezvous with Soyuz 2.
Soyuz 3 was intended to not just rendezvous with Soyuz 2 but also to dock with it. Despite multiple attempts, docking was not achieved, so the USSR claimed that docking was never intended. It wasn’t until documents were released following the collapse of the Soviet Union that the lie was discovered.