Of all the special dragon abilities, none is more valued at wartime than fire breathing. No dragons native to Britain are capable of it so the Aerial Corps has spent a lot of money trying to procure one. They failed to bring one from the Americas, but finally succeeded when Iskierka, Kazilik was successfully harnessed by John Granby. Laurence had previously recounting seeing an allied Turkish kazilik breathe fire during the Battle of The Nile.
Napoleon Bonaparte has several fire breathing dragons in his army as the Flamme-de-Gloire breed is native to that land. The most notable is Accendare, who fought against Temeraire shortly before the start of his journey to China.
Another breed capable of producing fire is the Flecha-del-Fuego of Spain.