The Units for the Reinstatement of Order are a special division of the Hellenic Police, whose primary and most infamous role is that of riot control.

The Hellenic Police is the national police service and one of the three security forces of Greece. It is a large agency with responsibilities ranging from road traffic control to counter-terrorism. Police Lieutenant General Dimitrios Mallios is Chief of the Hellenic Police. He replaced Lazaros Mavropoulos. The Hellenic Police force was established in 1984 under Law 1481/1-10-1984 as the result of the fusion of the Gendarmerie and the Cities Police forces.