"I can't believe this!" shouts Rainbow Dash.
"Calm down." Applejack says to her friend. Rainbow flushes as she realizes everypony in line is staring at her. Why are they in line and what is Dash excited about? An emerald green alicorn walks up in front of the line, followed by the princesses. All the ponies in line bow.
"Welcome to the birth of a new technology in Equestrian military. A close friend to us is the inventor behind the machines you are about to see." Princess Celestia starts, "Emerald, would you kindly bring out the tanks?" The emerald pony nods. He flies away for a second, the ground starts to rumble, a tan object appears, barely bigger than two ponies and Emerald is in the lower center, a rotating cylinder-box thing on the top, a hollow cylinder coming out of the turret. The moving machine rumbles past the line, and stops in front of the princess, Emerald hops out. Luna blushes as he pasts her. He looks to the eldest of the two princesses, who in turn nods to him.
"This beauty is the E1P5, Nightfury, Main battle tank. It's top speed just under 100 MPH, slow to the fast flying Pegasus but it is fast for a 73 ton machine, it's armor is 12 hoofs thick, and its 120 CM cannon can hit a moving target up to five miles away." Emerald says, a smile at the awestruck faces of the ponies in front of him. "And for those who will brave the great unknown, your career in the military. I am your instructor, commander Emerald Night, but please, call me Emerald. Those who seem promising will have a shot at my elite team, The Special Tank platoon X." Rainbow's eyes widen, as does AJ's. "Just sign your name up here to qualify." The line moves, as pony after pony sign up. When the two friends reach the front, they get a better look at Emerald, scars cross his chest, cool blue eyes. "You two seem promising, AppleJack and Rainbow Dash, both elements of harmony and good friends of my sister, Twilight. You will go through the training I went through, if you make the course cry uncle first, then Welcome to S.T.P.X. If not, you are still better than the average tanker." The two gasp as he signs their names on his clipboard. "See you tomorrow. Along with Rachel Blur and Blue blur." The two friends walk away shocked.
later that day.
Emerald lands at the tree house, library, what ever it is, and takes a deep breath. He hasn't seen Twilight since ten years ago, when he ran away. He knocks.
"Hello?" Twilight asks, opening the door, her jaw hits the ground after she sees who it is.
"Hey Twilight." Emerald says. The lavender mare pulls her second older brother into a big hug. "Yeah, I missed you two.
"Why are you back?" Twilight asks.
"Recruiting ponies for the E.R.M.C, don't know when I might be shipped out to combat, so I came by to say I'm doing alright.
"Please stay for the night, we have so much to talk about." Twilight asks. Emerald nods.
The next day.
"You four are here because I see the potential in you. I know you can make it through the challenges that you are about to face, and when you do, not if, when you do, I would be honored that you fight by my side."
"Yes Sir!" The four ponies say. For the next week the four ponies learn about the tanks, train in Simulators, difficulty on extreme of course, grueling physical training, and training in the real tanks. After that week is done, the four ponies emerge stronger that when they started.
"You four, at the start of the week, didn't even know how the make a tank move a foot, now, you can make a tank move a hundred miles, while firing. You have earned your spot in the S.T.P.X, welcome." Emerald says at graduation. The four ponies, who learned more about each other than they already knew, cheer. Emerald pins a patch that has a tornado on it to their right shoulder. You are in S.T.P.X Tera Platoon. After graduation, Princess Luna flies down to them.
"Emerald, we got a problem." She says.
"It is about Saw Whisk, isn't it?" Emerald asks. Luna nods. "Into the mission room."
"We got an intelligence report, An old enemy, Saw Whisk, a engineer that designed a weapon just incase Nightmare Moon returned, The eclipse weapon, it's job was to drain all magic from her to neutralize the threat, Saw went rouge and stole the weapon, we fear that he will use it to attack Equestria. The bad part is that Saw helped Emerald design the Tanks, and might be making them for the attack, as well as tank drones. the intel report we just got confirms that, and that he is mounting an attack on Canterlot in two hours." Luna says.
"If he does attack, He will have to go through us to get there." Emerald says, "Right squad?"
"Yes Sir!" Tera platoon says. Emerald smirks at Luna.