- This article is about an in-universe event. For the in-game mission, see Tin Castle.
After the success of Operation Anchorhead Freedom, intelligence discovered that the rebels had a base in the Amber Mountains. In preparation for the assault, Scarface Squadron received two new pilots, John Herbert and Kei Nagase; it was up to Phoenix which one would be his co-pilot. 
At 0500 hrs, Scarface Squadron entered the airspace over the Amber Mountains and began their attack on the base. The squadron faced some resistance from anti-air defenses and enemy fighters, but they were eventually able to neutralize all enemy forces and destroy the castle that the rebels were using as a base.
After the operation was completed, it was discovered that the base was full of supplies. The loss of these supplies would be a major blow to the rebels' strength.