Battle of Canterlot City (Great Gerabervia War)

"The Battle of Canterlot City seems to be when the ruthless empress Nadia Silbergeld of the Empire of Gerasecia is ravaging all of this city. Now that the 1st GP Colt Panzer Division is wrecking this place, I bet this could be a true consequence to the How I Can Help Make the world Great ceremony if we fail to stop it. How can that happen?"

--Su Ji-Hoon, The Great and Powerful Prophecy

In during the Great Gerabervia War from the alternate future timeline of USRAC War, Battle of Canterlot City is the massive battle between the Equestria Girls and their resistance versus the 1st GP Colt Panzer Disivion of the Empire of Gerasecia

It would be happened that ruthless empress Nadia Silbergeld became against the Equestria Girls after they have been framed for terrorist attacks in Empire of Gerasecia by the Belkan Grey Men disguised members,so that Empire of Gerasecia founded the 1st GP Colt Panzer Disivion to invade Canterlot City

However,it could be mentioned in the Great Prophecy of Disharmony and Chaos thatTrixie Lulamoon, Starlight Glimmer and Twilight Sparkle use magic portal to enter the afternate future of USRAC War, which the prophecy showed about alternate future timeline of Equestria and Gerasecia.