BASED ON EQUESTRIA AT WAR:

Since the end of the Great War, the Harmony and Weter Pacts have built countless tanks, nukes, and planes. Always wary of each other, both sides frequently fight proxy wars to spread their influence in the world. The flashpoint of this cold war is the Changeling border, where the Harmonious Free Changeling Hives and Communist Union of Socialist Changeling Hives prepare to be the frontline in a war few want to become a reality. In recent years, the Stalliongrad intervention in the River Republics have seen the Harmony Pact take a hard line, increasing their defensive capabilities across the board. After Equestria deploys SRBMs in the Free Changeling Hives, tensions have never been higher, and the world never closer to a second Great War. At this critical point, it won't be the plans of large militaries that set the world ablaze, but the actions of a single individual. The world is about to see the power of modern militaries, and Equestria and Stalliongrad are about to find out how their 30 years of planning and technological development will play out on the battlefield. This will be the biggest war the planet has seen, and it may be the last.

NOTE: Again this is based of the Equestria at War universe, a mod for HOI 4. Here is a link: https://equestria-at-war.fandom.com/wiki/Equestria_at_War_Wiki