The first Saturn 1B rocket (AS-201), developed at @NASAMarshall, lifted off on an unpiloted, suborbital flight #OTD in 1966. In all, 9 Saturn IB flights were made, ending with the Apollo-Soyuz Test Project (ASTP) in July 1975. More about this test flight: https://go.nasa.gov/3IOhM5T #NASAhistory
The first uncrewed spaceflight test of a production Apollo Command and Service Module (CSM), and the first launch of a Saturn-IB rocket, took place on Feb. 26, 1966.
