Area S3M4

"The Cake Fairies, the Seven Heroic Legends, the Sunset Tiger Company, the Sunlight Dragon Team, the Southern Song dynastic troops and those from the military forces of Fauwan and Cixilwan, including a few men from the People's Liberation Army, are all together building Area S3M4, an underground military facility that's build underneath Strawberry Mousse Castle. That's what it happens after the Sweetsheart Chaotic War. Okay, so what's next? Aliens arriving to the Sweetsheart Kingdom? People storming to that facility?"

--Su Ji-Hoon, S3M4

The Area S3M4,also known as Strawberry Area M4 or Type S3M4 Mousse Base, is the common name of a highly classified secret underground base located within the underground of the Strawberry Mousse Castle that it will be the first underground military base of the Sweetsheart Kingdom after Sweetsheart Chaotic War

It will be controlled by the Sweetsheart military and the Cake Fairies after they and The Seven Heroic Legends with the allied Chinese forces built. that they can start built the military technology with the military weapons and the military arsenal. It also include the training range and most likely supports the development and testing of experimental arsenal and weapons systems based on historical evidence after have future technology.

It also include the defensive structures,the military units that the Sweetsheart military can include the justice laws,military academies and barracks with factories and air base but they will deploy each military soldiers and military arsenal.