Since the late 1860s, there have been many organizations that have used the title "Ku Klux Klan" or have split off from KKK groups using different names.
During Reconstruction, there were a number of white supremacist paramilitary groups that were organized in order to resist the reconstruction measures. While the Ku Klux Klan was the most famous group, it overlapped in membership and ideology with a number of others. In some cases, they were virtually indistinguishable from each other.
Between the Reconstruction period, known as the Klan's "first era", and the rebirth of the modern movement in 1915, there were a handful of groups that scholars have identified as "bridges" that engaged in similar vigilante activities and introduced Klan-type organizing into areas untouched by Reconstruction. In some cases, small towns often had so-called "decency committees" or "vigilance committees", who often used vigilante tactics against targets such as criminals, prostitutes, drunkards, and in some instances, Black people, Native Americans, Mexicans, Chinese Americans, European immigrants, Catholics, Mormons, and non-Christians, including Jews and atheists. Sometimes, in fact, their attire or their disguises resembled those worn by the KKK.
During the "second era", the KKK movement saw the rise and decline of one of the largest and most influential Klan factions, the Knights of the Ku Klux Klan Inc. There were a few splinter groups, though, such as the Knights of the Flaming Sword, founded by ousted Imperial Wizard William J. Simmons and the Independent Klan of America, founded by Indiana Grand Dragon D. C. Stephenson. The 1930s saw the growth of fascist-leaning groups such as the Black Legion and a revived Knights of the White Camellia. It was also during this time period, that, for the first time ever, certain KKK groups began openly seeking working relationships with neo-nazi and neo-fascist groups, such as the German-American Bund and the Silver Shirts. The KKK also openly worked alongside the Anti-Saloon League, in their shared goals of enforcing prohibition.