Alternate history WWI with flying mage gunner battalions?

Sources:
The Saga of Tanya the Evil (Season 1)
The Saga of Tanya the Evil: The Movie

Song: Fur Elise by Hidden Citizens

My Twitter:
https://twitter.com/Jake_Whyman

Watch for free:
https://www.crunchyroll.com/saga-of-tanya-the-evil