I found this as a tag on derpi. Apparently it’s a mod for a game called Hearts of Iron IV, though you could just do any sort of WWII inspired mlp war art I suppose.
You have 45 minutes to draw, and 15 to submit. Have fun!
Artists:
https://rb.gy/vntcmu ( MoonatiksArt )
https://www.deviantart.com/mrscroup
https://www.deviantart.com/sinrar
https://www.deviantart.com/richmay