Paramilitary

Paramilitary describes forces which are organised as military forces, but are not part of the Armed Forces. Examples of such forces are police forces guarding the borders of a country. There are paramilitary groups that are official (run by a country), and others that are not.
The name comes from Greek "para" (which means "beside") and Latin "miles" (which means "soldier").
Military compared to paramilitary.
Though a paramilitary is not a military force, it is usually equivalent to a military's light infantry force in terms of intensity, firepower, and organizational structure. Paramilitary forces and organisations use "military" equipment, skills, tactics etc that are compatable with the civilian sector (IE: Urban environments etc). During peacetime, Paramilitary professions are usually found in areas such as high profile non-military sites such as laboratories, nuclear power plants, industrial explosive factories, seaports, airports, borders and government sites such as embassies, palaces, political summits etc tasked with roles of VIP protection, anti-terrorism etc. A paramilitary may also commonly fall under the command of a military, even despite not being part of the military or play an assisting role for the military in times of war.
Paramilitary forces can also include private military company missions.
Quasi-military compared to Paramilitary.
Although similar, a quasi-military organisation has more near-identical to military aspects ("i.e.", militia, insurgency, guerrilla, terrorist, rebel, drug cartel, private army, "etc.") whereas a paramilitary is its own ("i.e.," internal security, SWAT, coast guard, border guard, "etc.").