Soyuz T-1 was a Soviet space mission launched on April 15, 1973. It was the first flight of the Soyuz spacecraft to carry a crew, although it was uncrewed during this mission. The primary objective was to test the spacecraft's systems and prepare for future crewed missions. The mission lasted 7 days, during which Soyuz T-1 orbited the Earth and collected valuable data. It helped pave the way for subsequent missions, contributing to the development of human spaceflight and the Soyuz program, which has been instrumental in space exploration for decades.