"Is this the best that Marquis could do? I asked for warriors and he sent me teachers," he then turned towards Jason, "And even children. How bad do things have to be down there for these people to be sent to the front lines?"
All the teachers in the group shuffled a little as they realized that they were being insulted, but they couldn't say anything in retaliation because they knew that the man was right. They weren't soldiers. They were only teachers from Magus Academy and they won't have as much value as a fully-fledged guild member or a member of the army.
Jason wasn't even bothered by what the commander said because he faced worse insults in his last life. Things like these were common during initiations as the commanding officers would try their best to break your spirit with their words.