Combat 18 or C18 is name used by some groups/individuals and that is associated with Blood and Honour and the principle of "leaderless resistance". The 18 in its name is derived from the initials of Adolf Hitler, with A and H being the first and eighth letters of the Latin alphabet.
There is no central organization or leadership and it is thus possible for any group or individual to use the name.
Combat 18 originated in the United Kingdom in 1992, in response to antifa, but has since spread to other countries. Several individuals using the name have been convicted for various crimes.
- Setting the Record Straight, John Tyndall on Harold Covington and Combat 18 https://noncounterproductive.blogspot.de/p/john-tyndall-on-harold-covington-and.html
- A Well-Oiled Disinformation Machine http://www.fpp.co.uk/docs/people/Gable/PaulCox1996.html