Use conventional and three types of special weapons to overcome difficult situations. Take control of the battlefield with support aircraft! Long-established STG development team, Blue&White, the first new one in 13 years, and a new origin!

More than a decade of warfare between the MUltinational COmpanys Community (MUCOC) and the International Unification Treaty Organization (IUTO) has left both sides exhausted and A stalemate had been reached.

To break the deadlock, the MUCOC fleet gathered its remaining forces and launched Operation Earth Descent.

Although the IUTOs were allowed to descend, they put up a desperate resistance to prevent the expansion of the front line.

However, there were not enough surplus forces, and the counter-offensive was left in the hands of a mish-mash of new recruits and reserve forces.

The name of the unit was the "Blue Sabres".

Thus the battle later known as "Second MUCOC War" has began.