The Donnager-class battleship is a class of modern Martian Congressional Republic Navy (MCRN) battleship.

Donnager-class battleships are almost 500 meters long, about the same size as a 130-story office building. Measuring 250,000 tons dry weight, pound-for-pound Donnager-class battleships are one of the largest and most capable warships ever made.

The most notable elements of the Donnager-class complements are its two dorsal VX-12 "Foehammer" Turreted Ultra-Heavy Railguns. At the time of the class' construction, these weapons were amongst the highest-spec railguns in the Solar System and only matched by orbital weapons systems, such as the UNN Railgun Platforms. Thanks to the foresight of MCRN engineers the Donnager-class hosts a total of four railgun hardpoints on its hull, capable of doubling the ship's railgun complement should such technological advancements allowing such an upgrade become available.


The name "Foehammer" for the Donnager-class's railgun turrets comes from J.R.R.Tolkien literature, being a direct interpretation of the Elvish name of Gandalf's sword "Glamdring." It is also referenced in Stephen King's "Eye of the Dragon" and is the callsign of a human pilot in the Halo science-fiction universe.