Alien invaders invaded the planet, having exterminated most of the population, humanity, being on the verge of annihilation, united the armies and gave a serious rebuff to the enemy. After several years of war, the climate on the planet has changed. The military founded fortifications.

Alien invaders invaded the planet, having exterminated most of the population, humanity, being on the verge of annihilation, united the armies and gave a serious rebuff to the enemy. After several years of war, the climate on the planet has changed. The military founded fortifications.