This map takes place on the same one as in Chapter 1: The Battle of Fort Krest during the first phase of the mission. Some differences include watchtowers on the NW and SE corners of the courtyard, multiple destructible and indestructible walls, and grenadier shelters.
Squad E and their base camp will be in the north at the mouth of the bridge and their main objective is directly south, outside the courtyard. In addition, there's an Imperial camp in the SE corner of the courtyard, guarded by the ace.
Let's begin the mission briefing
"Imperial forces were sighted in Federation territory. Squad E's task is to stop them. The enemy is staying hidden as they advance, so we can't accurately gauge their numbers. Beware ambushes. If I were you, I'd sent in Scouts to scope out the area ahead of time."
Location: Fort Krest
Decription: Defeat the incoming hostile units by capturing the enemy base camp. The operation will end in failure if Godwin, Nico, or Rosetta perish.