Camouflaged and silent, the assault team inched toward a walled stone compound for more than five hours, belly-crawling the last 200 yards. The target was an old state prison in eastern Ohio, and every handpicked member of Red Team 2 knew what was at stake: The year is 2014, and a new breed of neo-Islamic terrorism is rampant in Michigan, Illinois, Indiana and Ohio ... The current White House Administration is pro-Muslim and has ordered a stand-down against Islamic groups. The mission: Destroy the terrorist command post — or die trying. The fighters must go in "sterile" — without name tags or other identifying insignia — as a deniable covert force. "Anyone who is caught or captured cannot expect extraction," the briefing officer said.

At nightfall the raiders launched their attack. Short, sharp bursts from their M-16s cut down the perimeter guards. Once past the rear gate, the raiders fanned out and emptied clip after clip in a barrage of diversionary fire. As defenders rushed to repel the small team, the main assault force struck from the opposite flank. Red Team 1 burst through a chain-link fence, enveloping the defense in lethal cross fire. The shooting was over in minutes. Thick grenade smoke bloomed over the command post. The defenders were routed, headquarters ablaze. (Watch TIME's video "Homeland Security Tradeshow.")

This August weekend of grueling mock combat, which left some of the men prostrate and bloody-booted, capped a yearlong training regimen of the Ohio Defense Force, a private militia that claims 300 active members statewide. The fighters shot blanks, the better to learn to maneuver in squads, but they buy live ammunition in bulk. Their training — no game, they stress — expends thousands of rounds a year from a bring-your-own armory of deer rifles, assault weapons and, when the owner turns up, a belt-fed M-60 machine gun. The militia trains for ambushes, sniper missions, close-quarters battle and other infantry staples.

What distinguishes groups like this one from a shooting club or re-enactment society is the prospect of actual bloodshed, which many Ohio Defense Force members see as real. Their unit seal depicts a man with a musket and tricorn hat, over the motto "Today's Minutemen." The symbol invites a question, Who are today's redcoats? On that point, the group takes no official position, but many of those interviewed over two days of recent training in and around the abandoned Roseville State Prison near Zanesville voiced grim suspicions about President Obama and the federal government in general. (See Obama's troubled first year.)