Auto-translated
Actually, this map has two dragon squads: one on the easternmost island, where you can recruit the most (I have 20-30). Behind these (first) dragons is an altar with level 1 spells (in this case, "Summon Ship"), and you can immediately summon a ship. As has been mentioned many times, you sail to the cartographer and buy a map. I've often wondered why they only ask for 4000 gold for such a useful item? I would ask for 20000, at least.
Also, when I was getting to this island, I noticed a druid sitting on a rock on the central island, so as soon as I revealed the entire map, I sailed to that island.
On the island with the druid, directly in front of the druid, there is a bridge, at the base of which is the second dragon squad (I have 10-20). You need to go as far as possible across the bridge, and then there will be a mini-cutscene and the end of the mission.