Equestrian guts and blackpowder

Worldbuilding (Equestria): After weeks of research, urged on by a request from Lyra Heartstrings, Twilight Sparkle had successfully carried out a favor (and massive curiosity of hers) for her. Little did either of the ponies know that this would lead to Equestria’s involvement in one of the most complicated, violent outbreaks in all its history. Taking some inspiration from the mirror portal's magic, Twilight had managed to open a gateway to earth- the planet where humanity resides. However, Twilight had failed to get the exact dimension and location right. As a result, she opened a gateway to an older time period in human history- the Napoleonic wars. Worldbuilding (Europe): All of Twilight's mistakes would be harmless, if it weren’t for the fact that in this version of earth, Europe was being overrun and tormented by zombies, or "cannibals" as all the soldiers and people call them. It's a threat against all humans and all ponies alike- causing cities to burn, nations to cripple under pressure, and creating hell on earth for the early 1800s. Every single European superpower was effected, leaving troops from all nations to survive- even banding together under the pressure of a far greater and more terrifying threat. Divided by language but united in survival, some famous battles quickly became/turn to holdouts of all armies as the zombie threat closes in. In terms of armaments, it's all relative to the era. Men are armed with muzzle loading muskets and rifles, bayonets, swords and early explosive devices. Carts and wagons are horse-drawn, and the world has seen no magic besides the religious faith that heals bite wounds and infections. Backstory: First appearing back in 1806, the blight had been found and contained in short bursts among the ranks of Russian troops. After the burning of Moscow, the thousands of corpses infested by the blight had begun resurrecting, and started to wreak havoc and death across the greater part of Europe during the various country's military campaigns. It had soon become less about fighting others, and more about surviving hordes of those who have died and reanimated. “The Blight”: Otherwise known as cannibals, vampires or "demons", this is the infection that plagues Europe. It has no known origin, an extremely high mortality rate, and emerged around the late stages of the Russo-Turkish war (1806-1812) with no known physical cure. On it's own, it is an infectious disease that causes fevers, weakness and eventual death if gone untreated. However, it affects those who failed to accept Christ and repent for their sins by, upon succumbing to the infection and dying, damning their souls to their dead bodies and making them reanimate. This does not happen to those who are with Christ, much less Priests or holy men. By extension, this also means that those who are still early in their infection can be saved by Christian chaplains or priests, via reading them their Last Rites and blessing them. Other religions cannot do this because they do not have priests. This also means, by extension, that ponies or pony soldiers must be blessed by a human priest if they have been bitten. Equestrian magic and medicine does not work on the blight, not even Zecora's medicine does. Zombies: The reanimated themselves are abundant in numbers, and feast on human and pony flesh. They cannot speak or think like a normal person would, as they are driven mad and twisted by the zombification. In sufficient numbers, no amount of magical ponies or countrymen would have a chance against them. If a person (or pony) is bitten by a zombie, they may not die immediately, but they will become sick with the blight. They cannot feel pain from anything, whether it be fire or bullet, but they can die again with a well placed headshot or neck-severing attack. Aiming for the spine is also a good idea, and dismembering them works too. There are a fistful of different zombie variants: Shamblers (walkers, your typical slow zombie), Runners (fast, weak, typically tackle their victims before tearing them apart), Zappers (extremely strong, uses an axe to cut down any living man or pony), Bombers (zombies that lug around powder kegs and torches, suicide bombing to take out as many survivors as possible), Igniters (zombies that carry lamps- they tend to throw them when lit, causing a massive area-denying pool of flame, scorching themselves and others as a result) and Cuirassiers (armored zombies with swords, who retain combat adeptness despite being infected, and can cut down anybody dumb enough to fight one without a gun or a sword). Equestrian magic: For ponies, unicorns especially, magic works perfectly fine in their homeland of Equestria. However, in the human world, it’s stunted- there isn’t much magical energy in this place at all, making it difficult to cast even something as simple as a shield or a scanning spell. Pegasi can fly, but they can’t mess with the clouds or the weather, as they pass right through them unlike equestrian weather. Infantry are all armed with spears, and maybe a unicorn or skilled earth pony wields a bow, but muskets and cannons for combat are all new to the peace-accustomed equine army. Equestrian priests (only shows up in encounters or battles after Berezina or late 1812): Should a pony decide to go against equestrian religion and rejoice in Christ with honesty, they will be imbued with what is holy- this especially applies to unicorns. This holy effect will empower their magic, and restore what power they might’ve lost. Equestrian priests can bless other ponies and mankind, regressing and diminishing whatever evil may have been in their systems.