A March in the Snow, Part 1 is the first part of the seventh chapter of Valkyria Chronicles 4. The combat mission in this is Mountainous Retreat.
Claude, I've got a situation report for you
"Our orders are to outrun the Imperials and make it through the mountains. There's a clearing north of here, so let's get there first and get into formation. The enemy's closing in from behind, so there's no time to lose. We won't be able to set up camp, either. Don't count on getting reinforcements. Hate to say it, but we're still catching our breath from the last retreat. If we lose too many troops, morale will drop so low we may never recover. We need to clear every obstacle in our way to make sure that doesn't happen. And I'm sure this terrain has some good sniping spots, if you know where to look."
Location: Achtzehn Mountain Trail
Description: Get 3 units to the target while fending off pursuit. The countdown from critical condition to death/retreat is reduced by 1 turn. Do not lose more than 3 units.