Dear Recruit,
You are safe in your base, for a moment at least. Collect your wingmen and set off to win World War III.
Your Mission:
Defeat the Germans (no offence to Germany) and recover the stolen crystal; it is the prized possesion of your country. Infiltrate their base, kill your enemies and collect the crystal. Be careful; they have planted claymores outside the base for protection. Shoot them down and wait a while before passing.
Good Luck!
Colonel Queensbury.
P.S. They have guarded their base well, be careful.