existence of the Knights of the Golden Circle was not, in fact, a secret. Background European colonialism and dependence on slavery had declined more rapidly in some countries than others. The Spanish possessions of Cuba and Puerto Rico and the Empire of Brazil continued to depend on slavery, as did the Southern United States. In the years prior to the American Civil War, the rise of support for abolition of slavery was one of several divisive issues in the United States. The slave population there had continued to grow due to natural increase even after the ban on international trade. It was concentrated in the Deep South, on large plantations devoted to the commodity crops of cotton and sugar cane, but it was the basis of agricultural and other labor throughout the southern states. Early history George W. L. Bickley, a doctor, editor, and adventurer who lived in Cincinnati, founded the association, organizing the first castle, or local branch, in Cincinnati in 1854. Membership increased slowly until 1859 and reached its height in 1860. The membership, scattered from New York to California and into Latin America, was never large. Records of the KGC convention held in 1860 state that the organization "originated at Lexington, Kentucky, on the fourth day of July 1854, by five gentlemen who came together on a call made by Gen. George Bickley". Some Knights of the Golden Circle active in northern states, such as Illinois, were accused of anti-Union activities after the Civil War began in 1861. Hounded by creditors, Bickley left Cincinnati in the late 1850s and traveled through the East and South, promoting an armed expedition to Mexico. The group's original goal was to provide a force to colonize the northern part of Mexico and the West Indies. This would extend pro-slavery interests. In August 1861 The New York Times described the order as a successor to the Order of the Lone Star, which had been organized for the purpose of conquering Cuba and Nicaragua, succeeding in the latter cause in 1856 under William Walker before being driven out by a coalition of neighboring states. At that time the order's prime objective was said to be to raise an army of 16,000 men to conquer and "Southernize" Mexico, which meant making slavery, not legal in Mexico, again legal, while supporting the "Knights of the Columbian Star"—those in the KGC's highest level of membership—for public