Space 1889

Great Britain has more experience with aerial combat than any other nation on Earth but has still only been building aerial gunboats for less than a decade. The first British experience with aerial warfare was on Mars during the Gorovaangian War (1878-79), also now referred to as the First War of the Parhoon Sucession. British officers and men, largely from the Royal Artillery, served alongside Parhoonese cloud sailors in Parhoon's small fleet, manning a handful of modern machineguns and field guns hastily lashed to the wooden decks of the Parhoonese screw galleys.

http://mateengreenway.com/steampunk/Space1889UK.htm