Unmanned aerial vehicles (UAVs); Unmanned aerial vehicles (UAVs) with interchangeable payloads for counter-drone defense, crowd control, surveillance, and less-lethal applications; Remote-controlled aerial vehicles; Radio-controlled robotic aerial vehicles; Unmanned aerial vehicle (UAV) deployment systems; Unmanned aerial vehicle (UAV) deployment systems, namely a modular deployment system for mounting to various platforms and surfaces; Unmanned aerial vehicle (UAV) deployment systems, namely a modular deployment system for mounting to vehicles and fixed structures; Unmanned aerial vehicle (UAV) deployment systems, namely a modular deployment system for interfacing with drone detection systems; Unmanned aerial vehicle (UAV) deployment systems, namely a modular deployment system for deploying UAVs; Unmanned aerial vehicle (UAV) deployment systems, namely a modular deployment system featuring computer software for counter-drone defense; Unmanned aerial vehicle (UAV) deployment systems, namely a modular deployment system featuring computer software for capturing, processing, and transmitting data collected from UAVs; Protective cases for unmanned aerial vehicles (UAVs); Protective cases and mounts adapted for use with unmanned aerial vehicles (UAVs); Protective cases and mounts adapted for use with unmanned aerial vehicles (UAVs) featuring computer software for deploying UAVs from the protective cases; Protective cases and mounts adapted for use with unmanned aerial vehicles (UAVs) featuring computer software for interfacing with drone detection systems; Protective cases and mounts adapted for use with unmanned aerial vehicles (UAVs) featuring computer software for counter-drone defense; Protective cases and mounts adapted for use with unmanned aerial vehicles (UAVs) featuring computer software for capturing, processing, and transmitting data collected from UAVs utilizing the protective cases; Protective cases and mounts adapted for use for deploying unmanned aerial vehicles (UAVs) from vehicles; Protective cases and mounts adapted for use with vehicle-mounted unmanned aerial vehicles (UAVs).