The Imperial Navy, known as the Navis Imperialis in High Gothic, is one of the primary armed forces of the Imperium of Man.
While the Astra Militarum (Imperial Guard) represents the Imperium’s ground forces, the Imperial Navy is responsible for the fleets of starships that maintain order between the stars and planets in the Imperium, for all space and air support provided to the infantry of the Astra Militarum through its Aeronautica Imperialis branch, and for transporting those Guardsmen across the galaxy to the Imperium’s myriad warzones.
The battlefleets of the Imperial Navy are constantly engaging threats both inside and outside the Imperium’s borders.