There was another body of dreamers, still more singular, who were also bitter opponents of Lincoln. They were, however, not in favor of war. Their political machinery consisted of secret societies. As early as 1860, the Knights of the Golden Circle were active in Indiana, where they did yeoman service for Breckinridge. Later this society acquired some underground influence in other States, especially in Ohio, and did its share in bringing about the victories at the polls in the autumn of 1862, when the Democrats captured the Indiana legislature.

The most serious charge against the Golden Circle was complicity in an attempt to assassinate Oliver P. Morton, Governor of Indiana, who was fired at, one night, as he was leaving the state house. When Morton demanded an investigation of the Golden Circle, the legislature refused to sanction it. On his own authority and with Federal aid he made investigations and published a report which, if it did not actually prove treason, came dangerously near to proof. Thereafter, this society drops out of sight, and its members appear to have formed the new Order of the American Knights, which in its turn was eclipsed by the Sons of Liberty. There were several other such societies all organized on a military plan and with a great pretense of arming their members. This, however, had to be done surreptitiously. Boxes of rifles purchased in the East were shipped West labeled "Sunday-school books," and negotiations were even undertaken with the Confederacy to bring in arms by way of Canada. At a meeting of the supreme council of the Sons of Liberty, in New York, February 22, 1864, it was claimed that the order had nearly a million members, though the Government secret service considered half a million a more exact estimate.