The first time I played, there were around 380 dragons, and I only had about 50. How could I break through the garrison with such an army, and then defeat it?
Show me your skills. Here are mine

I cleared the garrisons without any losses. It was a little more difficult with Faidaen. I lost all my melee fighters. Only the archers survived.
Oops, I mixed it up. I killed Faidaen's assassins right at the beginning of the battle. The ones who survived on my side were: Furies, Twilight Witches, Master Archers, and Druids with deer heads.