August 2028, five years after the eradication of the plague, the world is in another danger as an evil mad scientist named Professor N. Shroud launches a surprise invasion. Within a few days, many countries and/or major cities are fallen. Knowing NATO isn't powerful enough to fight against the outside threat, they gather other non-NATO nations from Russia, East Asia, the Middle East, and other countries that have the decent military capability to form an allied faction called NATOUF.

Four years later, in 2032, after the Battle of Kuwait, the United Forces capture one of the portals and reactivate it. Unknowing what the other side of the portal would look like, they send some platoons to enter the portal to investigate. As the scout teams arrive, they discover that is a place full of snow and crystal.

Meanwhile, the royalties and heroes of Equestria notice that an atrocious evil has returned and gathered more local evil powers to conquer Equestria. One of them is Queen Celestia's eldest son, who is jealous of his younger brother is worth being the new ruler of Equestria. To seek revenge, he found a warlord to overthrow the throne. This leads Equestria on a brink of civil war.

When NATOUF meets the Mane Six and the royalties, realizing that they have common enemies, they form a new allied faction, Terra-Equuis Harmony Alliance, or TEHA for short. They fight together to defend and protect their land, and harmony.

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This story is inspired from Age of Equestria series by MelSpyRose

This is my first fic. I was planning to write in English only, but I decided to write Traditional Chinese first and translate it into English to make life easier. If you're interested in the Traditional Chinese version, you can read it in my DeviantArt

I hope you enjoy this story. Thank you.

All characters belong to MelSpyRose, venjix5, Courageous-0f-Light, and Zacharygoblin55