The use of remotely piloted aircraft or unmanned aerial vehicles, most commonly known as drones, has grown rapidly in recent years. Given the increasing trend towards use of armed drones and their rapid proliferation, it is crucial that their use is brought in line with international human rights and humanitarian law. Amnesty International is therefore calling on all States to articulate and rigorously implement clear, binding and transparent policies on the use and transfer of armed drones that incorporate the key principles outlined in this briefing.