Police department in the context of "Crime"

A political union is a type of political entity which is composed of, or created from, smaller polities or the process which achieves this. These smaller polities are usually called federated states and federal territories in a federal government; they are called prefectures, regions, or provinces in the case of a centralised government. This form of government may be created through voluntary and mutual cession and is described as unionism by its constituent members and proponents. In other cases, it may arise from political unification, characterised by coercion and conquest. The unification of separate states which, in the past, had together constituted a single entity is known as reunification. Unlike a personal union or real union, the individual constituent entities may have devolution of powers but are subordinate to a central government or coordinated in some sort of organization. In a federalised system, the constituent entities usually have internal autonomy, for example in the setup of police departments, and share power with the federal government, for whom external sovereignty, military forces, and foreign affairs are usually reserved. The union is recognised internationally as a single political entity. A political union may also be called a legislative union or state union.A union may be effected in many forms, broadly categorized as:

• Incorporating union
• Incorporating annexation
• Federal union
• Federative annexation
• Mixed unions

Kozani (Greek: Κοζάνη, pronounced [koˈzani]) is a town in northern Greece, capital of Kozani regional unit and of Western Macedonia. It is located in the western part of Macedonia, in the northern part of the Aliakmonas river valley. The city lies 710 metres (2,329 feet) above sea level, 15 kilometres (9 miles) northwest of the artificial lake Polyfytos, 120 km (75 miles) south-west of Thessaloniki, between the mountains Pieria, Vermio, Vourinos and Askio. The population of the Kozani municipality is over 67,000 people. The climate of the area is continental with cold and dry winters, and hot summers.

Kozani is the home of the University of Western Macedonia, with about 15,000 students from all over Greece and other places. It is also the seat of West Macedonia's court of appeal, police department, fire brigade, the seat of the 1st Army Corps of the Hellenic Army and of the Bishop of Servia and Kozani.

A chief of police (COP) is the title given to an appointed official or an elected one in the chain of command of a police department, particularly in North America. A chief of police may also be known as a police chief or sometimes just a chief, while some countries favour other titles such as commissioner or chief constable. A police chief is appointed by and answerable to a state or local government.