https://www.kickstarter.com/projects/500655604/madness-project-nexus-2
The MERC faction, a rag-tag, barely functional group that roamed Nevada, constantly on the cusp of being completely obliterated. The incident at the Nexus core, however, allowed their opportunistic leaders to seize the weapons and means to train their units, as well as expand their ranks to such a degree that they present a substantial threat. They possess the ability to traverse the city's Great Walls with greater ease than even the A.A.H.W., and their swollen numbers lend to a brutal, versatle force that is to be reckoned with. Intel find that while their units fall into archetypical roles, the results they produce are nothing to dismiss.
Have some concept art of the more basic MERC units.. :D
https://www.kickstarter.com/projects/500655604/madness-project-nexus-2