The following is the April 13, 2022 Congressional Research Service report, Unmanned Aircraft Systems: Current and Potential Programs
From the report
Since the dawn of military aviation, the U.S. military has been interested in remotely piloted aircraft. Present-day unmanned aircraft systems (UAS) typically consist of an unmanned aircraft vehicle (UAV) paired with a ground control station. UAS have become ubiquitous in U.S. military operations since the 1990s with the introduction of the MQ-1...
https://news.usni.org/2022/04/20/report-on-current-future-pentagon-unmanned-aerial-vehicles-programs