Here we see the Asterion and the Cerebus, two sky monitors of the Daedalus class engaged in a bombardment against the Martian Remnant. The view is likely from the carrier Inescapable (formerly the MV Acadian Princess) prior to her loss in 1922.
While few were completed in time for the conflict, the class was notable for applying the principles of Martian gravity reversal drives to shock loads as well as suspension and locomotive needs. This enabled the prodigious shell weight of the main battery, which proved so useful in operations against the remaining turret complexes at the poles.
This image is entirely digital, and is one of a series of illustrations for my 'Spacecraft of the First World War' project.