Allen reassured his classmates that he would provide them with his help as long as it concerned their resistance to the Supreme Academy.
But it doesn't mean he wouldn't help his classmates if they needed his help on problems that don't concern the Supreme Academy. As long as it only slightly inconveniences him, Allen would without a doubt provide his classmates with his help.
But if it's beyond that, Allen wouldn't do anything as he would deem such a problem as too troublesome especially when that problem doesn't concern him.
\Allen: Anyways, we have already decided on the funds, information gathering, and espionage. So who will volunteer to be part of the combat group?\
After Allen asked that question to his classmates, his classmates that have combat prowess decided to volunteer to be part of the combat group.
