For the Ponies At War Summer writing contest.
The newest carrier under Celestia's sun, the ERNS Stableside, was rushed out of docks for training and preparation months ago. Under the eye of Admiral Azure Bliss it acts as the headquarters of Force S, and is currently heading a task force on its way to Ain Trotgourait.
Because of its rushed production, and general political kerfuffles involving it being under the authority of the Celestial State rather than Equestria herself, it is currently without aircraft. Though this is about to change, following Macawia's entry into the Convocation of Creatures they have sent some of their newest carrier aircraft designs to be used on the Stableside.
In a show of good faith, and on behalf of the Macawian president, these will include Macawian-trained pilots and their famous pegasus Air Marshal, Midnight Lancer.