Portals, gateways, however you call them, they either lead to another world... Or a different dimension.  More often than not, those who wish for peace are not the ones to open such things, but rather, those who wish to colonize and conquer. That was their mistake, their gravest and greediest mistake yet. Relying on ancient weaponry, heroes and magic, they had no chance against the well equipped and battle hardened Multiversal-faring clones.  The MSDF.