While we were all training and having somewhat of a fun time together, the world outside also moved on and didn't come to a standstill.
I didn't give what Mr. Black accidentally revealed to us that day a second thought but later on I would find out just what he was implying. The school or his own information sources must have informed him what was going on in the non-human nations. Us students couldn't get much information from the outside, we were only allowed to send letters to our family only once every couple weeks. Nobody wrote something in there aside from personal matters, so politics of the outside were kept hidden.
The military probably checked all the letter, so no one could leak any vital secrets to the outside. Not that we knew for sure since nobody even dared to try.