Support a team of four to engage in intense offensive and defensive battles. Some members of the team need to focus on defending the base, setting up landmines and machine gun towers at key intersections to prevent enemy attacks, while others lead mobile units to launch surprise attacks and restrain enemy forces. There is also someone responsible for controlling mortar units to accurately bombard enemy defense fortifications from a distance. When mortar shells successfully penetrate enemy defense lines, the entire team can gain a sense of achievement.