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...
the base's TSF squadrons and defensive 
units might be sent as reinforcements—
أسراب ت.س.م والوحدات الدفاعية الخاصة بالقاعدة 
—قد يتمّ إرسالها كتعـ
nuestra base cuenta con escuadrones
de máquinas de combate y unidades def…
nuestra base cuenta con escuadrones
de máquinas de combate y unidades def…
gli squadroni TSF della base
 e le unità di difesa faranno da rinfor―
os esquadrões e unidades defensivas de CTSs
das bases podem ser enviados como reforço—