Place 4 commanders plus Gena on the square just outside Bamar. On the next turn make them
attack one after the other. The point is to tire out and whittle down the dragon's HP so
that number 4 or 5 commander can kill it. You may let your decoy commanders run when
they're about to die. Then move the next one in for the kill (or the next)

what can I do to return them in the normally way?

Any good tips on how to beat chapter 2?

...there's no way to make your commander's unit return,so use them as your advantage...use
the lone wolf(jackal) ,because jackal has no unit....,haunted

Will the Dragon's Lord's health always read "9999/9999"? Cause i've sent wave after wave
at him and his health never drops

Dragons have over 999 health. Won't see it drop till its below that. Use items or supers
that lower morale, this will let u do a lot more damage and take less. Nightly and jackal
r both good for dragons, and geo can weaken them. In one campaign i found orochimaru and
he took out a water dragon king on his own.