Desperate and out of options to stop the crisis of their declining population, Equestria created a portal to the human world to convert the population to supplement their own; only that this was not the world they had planned.
Thera, a world that barely survived the Great War that lasted a hundred years and numerous Xeno incursions, now find themselves connected to a magical fantasy world of mythical creatures via a dimensional portal. A surprise to be sure and pleasant one at that, considering the numerous others that appeared to their world with ill intent. Little did they know how wrong they were before they discovered the truth.
As tensions rose, armies mobilise and civil unrest escalate; war is now inevitable.
Inspired from a conversation with Rated Ponystar and set from my fictional world of Thera based off of the Paradox game Stellaris, TCB: Thera dives into various perspectives within the conflict through exchanges of letters, correspondents from both sides, recorded meetings and propaganda.
See the conflict progress through the eyes of an observer as Equestria challenges the world who declared to the galaxy that all who threaten them will know that they came to the wrong neighborhood and knocked on the wrong door.