On April 19th, 1973, a race of extra-terrestrial lifeforms launched a landing unit from the moon, which touched down on Earth, in central Asia. Ever since, mankind has been engaged in a losing war against this alien species, known as the BETA, as they have gradually expanded outwards across the globe. After 20 years of non-stop fighting, the war has reached the shores of Japan...
I repeat, Alpha is to mobilize immediately...
...أكرّر، على سرب ألفا أن ينتقل على الفور
Ich wiederhole!
Die A-Staffel soll sofort mobilisieren!
Ripeto, la Compagnia Alfa
 deve mobilitarsi immediatamente...
Repito, Esquadrão Alfa, partida imediata!
Эскадрилья А, на вылет!