Allied Pilot: Damn!
Allied Radio Operator: What is it?
Allied Pilot: They have an Orbital Laser!
Alliec Commander: Why would they use that? It doesn't matter now, fire the Plasma Cannons!
Allied Captain: Yes Sir!
[Plasma Cannons firing]
Sep. Pilot: I see a laser-beam... is that ours captain?
Sep. Captain: Let me see... Oh, What The Helll!
Sep. Pilot: What?
Sep. Captain: It is not ours! That is not our laser beam from the Orbital Strike Satelite!
Sep. Pilot: Command! We need help! The enemies have a laser too! They managed to down half of our jets!
Sep. Commander: Retreat to safety and await orders, we will have our Electronic Fighters handle it
Sep. Captain: Yes Sir!
[Meanwhile, at Helsinki]
Oni789: Alright! We have to plan right now, because we will attack the Allies and the Seperatists!
GoldenEagle: Ok, what about we spy on them first? And after that, we strike 'em with everything we got!
Oni789: Ask the others if they are fine with it, me, I am okay with that plan... anyone?
Other Terra-Army Leaders: We are fine with it!
Oni789: Well then, the plan will be put into action tomorrow, meeting dismissed!

60000 feet above sea level, 7.58 AM, very old separatist SR-91 Aurora
SR pilot: Okay, we see 'em. They have eight plasma cannons ready to fire at any time. Over.
Sep. commander: OK, we will prepare our orbital strike. Return to base. Over.
SR pilot: Retuning to base. Over.
One hour later
[SR-91 lands]
Sep. commander: Fire when ready.
[Orbital strike laser destroys a plasma cannon]
Sep. commander: Fire again!
[Orbital strike destroys another plasma cannon]
Allied commander: Damn! We have to strike back! Send two bombers in separatist base! And try to destroy that damn orbital
strike!
Meanwhile, a terra-army's reconnaisence plane is taking off.
Terra-army commander: Spy-1,you're clear to take off.
Spy-1: (reconnaisence): OK, taking off.
2 hours later
Spy-1: Looks like separatists and allies are having a little battle.
Terra-army commander: OK, we will launch couple of F-239s there.
Spy-1: OK.
Terra-army commander: launch seven F-239s!
Terra-army pilot: Yes sir!
[F-239s take off]

ALLIES
United States
Canada
UK
Germany
Spain
France
Manchuria
Australia
Saudi Arabia-MemeKingIndustriesAndMegaCorporation
Liberia
Peru
Kutrika(Aliens)
.
SEPERATISTS
Russia
Confederate States
Quebec
Bavaria
China
N.K.
India
TERRA-ARMY
Alaska
Siberia-GoldenEagle
Nordic Union-Oni789 (Finland)
Turkey
Brazil
Indonesia
South Africa

Tell me which country you want to be, there can be more than one player per country.

Credit to @GoldenEagle for the first half of the story and countries in the alliances.