There has been a significant increase in the proliferation of military uninhabited aerial systems (UAS), as shown by an increase in total UAS and loitering munition arms transfers, which rose from 736 units in 2001–2010 to 1,734 units in 2011–2020. To better understand this development and the prominent role of UAS in recent conflicts, this report seeks to answer three key questions: (1) Which countries are driving the greater demand for UAS? (2) Where is the supply to meet the demand comi...