Fire Emblem: Shadow Dragon/Chapter 22

A Knight-Filled Sky

"The Medon that Minerva and Maria remembered best was one of peace: a quiet, prosperous kingdom famed for the flying beasts favored by dracoknights. But then their brother, Prince Michalis, succumbed to his lust for power. Despite his sisters' adamant opposition, he sword allegiance to Doluna; and when Medon's Dragoons took flight, the world suffered. Even now that the tides had turned, Michalis took position for one last stand. Dracoknights filled the sky end to end, eager to pluck Marth from the Earth."

Preparation
This battle is about speed and endurance, as you will need to fight multiple enemies while rushing to Gotoh's village. Whoever has the two orbs, trade them to Marth now. Start the battle when ready.

Begin
On turn 1, use Beck to kill the thief. Move the other units forward through the right side. Keep rushing, use Beck to kill some of the dragoons up there. By the time you reach the village, all but a few units should be killed. Beck can keep being used to kill the remaining few units left. Then, go to the village with Marth, who has both orbs in his inventory.

Move your units up the steps in front of the forts. For a few turns, two reinforcements will spawn in. They make for good experience for any lower level units you might have. However, make sure that you bring up your higher level units as a whole wave of enemies will appear. I recommend attacking with your units, then using a healer, like Lena, to use Fortify. It heals all your units for a vast amount of HP.

The reinforcements end at about turn 15. Note that the boss should be the only enemy left. He carries an Iote Shield, which negates an archer's advantage over fliers. You still can damage him with arrows, it just won't be super effective. The boss himself doesn't pose a major threat.

Seize the gate afterwards.