Over the years, other radical groups were formed for various reasons. However because perhaps of a lack of a truly united front or cause, they were all systematically defeated (but not without great cost in resources, time and people).
It would not until the Japanesse occupation of the 2020's would there be another guerilla war of nationwide scope. At first, the different factions from the different peoples tried to fight them the best they could, hopelessly outgunned by the occupying Marines.
It was during the 9th of April of 2031 when representatives of the different groups smuggled their way to Bataan. They met at the wilds surrounding the foot of Mt. Samat, the site where the USAFE made it's stand during WWII, where they were summoned via secret communique. Their 'benefactor' turned out to be the dragon Masaru, who also wished to see the Japanesse ousted from the land. The details are kept hushed, but it would seem that Masaru would promised to provide them with a means of waging a coordinated war against the Japanesse. The leaders eventually agreed to this arrangement, christening their movement after the original band of freedom fighters who fought against Japan.
The Huk continues to wage a guerilla war to this day. They primarily rely on smuggling, kidnap-for-ransom missions and the sale of pirated media to fund their operations, while Masaru provides that which they need but could not be procured through the 'conventional' means.