In modern times, cross burning or cross lighting is a practice which is associated with the Ku Klux Klan. However, it was practiced long before the Klan's inception. Since the early 20th century, the Klan burned crosses on hillsides as a way to intimidate and threaten black Americans and other marginalized groups.
In Scotland, the fiery cross, known as the crann tara, was used as a declaration of war. The sight of it commanded all clan members to rally to the defence of the area. On other occasions, a small burning cross would be carried from town to town. It was used in the War of 1812 between Britain and the U.S. as a means of mobilizing the Scottish Fencibles and militia which were settled in Glengarry County, Ontario against the invaders. In 1820, over 800 fighting men of Clan Grant were gathered, by the passing of the fiery cross, to come to the aid of their Clan Chieftain and his sister in the town of Elgin, Scotland. In Scotland itself, the last significant use of the burning cross was made in 1745, during the Jacobite rising, and it was subsequently described in the novels and poetry of Sir Walter Scott, particularly The Lady of the Lake of 1810.
In the first era, reconstruction Klans did not burn crosses. The belief that reconstruction Klans burned crosses was introduced by Thomas Dixon Jr., in his novel The Clansman: A Historical Romance of the Ku Klux Klan (1905). A cross burning is first described in Book IV Chapter 2 "The Fiery Cross" on pages 324–326 of the 1905 edition. It is introduced by one of the characters as "the old Scottish rite of the burning cross. It will send a thrill of inspiration to every clansmen in the hills." It is further elaborated that
In olden times when the Chieftain of our people summoned the clan on an errand of life and death, the Fiery Cross, extinguished in sacrificial blood, was sent by swift courier from village to village. This call was never made in vain, nor will it be to-night in the new world.