It didnt. That is a Mobile Base. From that Base the Attack was launched in the first point, thus they were probably able to get back to it as it wasnt that far away.

Population control? Too many young aggressive men and women for too few jobs. Eugenics? Survival of the fittest because the fascist government needs strong people to rise into leadership. An aggressive outlet from all the propaganda?

In movies, a lot of the actors wear heavy cowhide leather to protect them from falling and being hit by items such as broken glass. In the old westerns, you will notice that when the cowboy finally runs out of the burning barn (only to get shot) he is always wearing leather jeans. On one movie where the set really caught alight, although it was not in the script, the guys were rolling on the flames to put them out with their leathers. Do you like wearing leathers for rough wear.?