The Second Modern War is an event taking place in the year 2029, after the First Modern War, and is the setting of Metal Slug 2 (and its remake, Metal Slug X). The influence of Morden's Rebel Army had already been eradicated, but those sympathetic to his condemnation of the rot among the General Forces' leaders and governments worldwide were surprisingly numerous and led to an endless series of fitful, small-scale uprisings.