The Imperium of Man is a vast, galaxy-spanning interstellar human empire. There are many branches of the Imperium's armed forces and law enforcement agencies, and much of their equipment is common across multiple branches of the same service. The armed forces of the Imperium include, but are not limited to, the Space Marines, the Imperial Guard, the Adeptus Mechanicus, the three Ordos of the Inquisition, the Adeptus Arbites and the Orders Militant of the Adepta Sororitas.