Some of the men are from the area — Ferguson or surrounding towns also defined in part by the gulf separating the mostly white law enforcement agencies from a mistrusting African American public. Many others — it is hard to quantify the percentage — have arrived by bus and by car from Chicago, Detroit, Brooklyn and elsewhere.

They will not give their names. But their leaders say they are ready to fight, some with guns in their hands. “This is not the time for no peace,” said one man, a 27-year-old who made the trip here from Chicago…

Ferguson police officials would not quantify how many looters have been arrested since the Brown shooting but presented a Washington Post reporter with a stack of roughly 50 arrest reports. While some of those arrested for stealing are from Ferguson, a large number have addresses listed in Illinois or in Texas.