“This was truly a journey beyond all imagination. Five thousand meters… No, perhaps even higher than that. The clouds already below them, they ascend the frozen mountain. Suffocation… Vertigo… They were already approaching the limits of their strengths.”
Frozen Land is Chapter 13 of Book 2 of Fire Emblem: Mystery of the Emblem and Fire Emblem: Shin Monshō no Nazo ~Hikari to Kage no Eiyū~. Enemy reinforcements will come from the forts and upper corners once the island in the middle is approached.