Here's a list of the most notable factions in /pol/andcraft history:
A list of forgotten or undocumented factions:
Neumark
Papal States
Leftypol
USA
Enclave
AnCap
Politzania
EmpireFrancais
NSDAP
Majestic 12
NBP
SPQR
Yevenshire
Anarchy
United Kingdom
Umbrella
Autism
Luftwaffe
Psilocybin
DecafDwarf
MOSS
Saudi Arabia
JewsoapFactory
SocialistIndustry
Kalubrota
Kobria
Knights Templar
LITAS
SUNBROS
Gaels
Solvada
Alpen Republik (reformed into Neumark)
Saxony
Kingdom of Bavaria
2Spartan
Nazi Workers Party
Altruists
AnCaps
Arnor
Bankers
Dubai
WBC
FederalReserve
League of Extraordinary Goyim
Kingdom of Novanta
Rhodesia
Singularitists
Meikleland
Helvetica
Socialist Republic of Honest Farmers
Cascadia
The Communists
Bounty (Macedon)
The Saxon Empire
The Noble Republic
Al Qaeda
Glorious Baldslam Theocracy
The Church of Unitology
Kingdom of Avonmarch
Nomadic herders
Libertarian Left
National Libertarian Furry Jewess Party
Popular Front of /pol/and
Sweden
Bohemia(Praha)
Sparta
DecafDwarves
Islehaven
Winterkeep
Aliums
Consortium
Helmstead
Oppella
Red & Anarchist Action Network
Union of Socialist Miners
RussianEmpire
Anarcho-Capitalists
Interzone
Patriarchy
Reich
Celtic Barbarians
Muscowy
Sovereign Nile Republic
Freedonia
UKIP
Sumerians
Vapirism
Israel
TheSurvivalists
MouldIsAwesome
Vagabonds
imperium
Vietcong
Senatorum
Genoa
Snowdenstan
DStation
JIDF
Oregon
Israel (Formerly JIDF)
Khmer Rouge
Vietcong
Dixie
Trader
British
Elysium
Atlas
VPS
MONGOLS
Wehrmacht
JIDF
Templar
The New Lunar Republic
OCD (Obsessive Compulsive Dictatorship)
Thelycan
The White Brotherhood
Guild of Mercenaries
Niggertopia (2PAC)
zulu
Paulberg
CSA
Stonefort
SilentDawn
Thenemisis
TFC
ADF
Rothbard
TOSB
Crusaders
Svitjod
CCaliphate
Sogndal
COM
Israel
Kaczynski
Legion
USBF
Feel free to continue the list.