If possible, create a second page with a list of sacked soldiers and the option to reenlist them (should cost extra money). Gov's and businesses do rehire people they've let go before.
Why would I need to rehire a soldier? I only sack soldiers with terrible Bravery stats since rookies can always be used either as cannon fodder or as guards for secondary bases. And if the choice is between rehiring a mediocre soldier or hiring a new one then I'd rather take my chances with the new guy rather than a low bravery soldier.
What if they want to rehire you after you've been proven right in the dispute that got you fired?OrWhat if the boss who fired you got fired and your buddy took his place?Or What if they offered you a crap load of money?