Stop the Enemies Mobile Fortress is the first stage from M.U.S.H.A..
The M.U.S.H.A. team launch their attack against the enemy, but their mobile fortress attacks them from a distance, disabling most of the team. Only Ellinor manages to pass through the fortress' barrage, so she gives pursuit to it.
The stage begins with a fight against the boss, which retreats after having its frontal cannons destroyed. It is a very simple stage, serving as a warm up for what's to come, with many weak flying enemies and cannons on the houses in the background. Close to the end Dire 51 will make its first appearance, appearing briefly and shooting a few bullets before leaving.