Franc Tireurs Partisans
the Francs-tireurs partisans (FTP, "Partisan irregular rifflemen") were fighting formations of the French Resistance during the Second World War.
Initially called Organisation Spéciale (OS. "special organisation"), they were created by Communist activists. A number of their leaders had served in the International Brigades during the Spanish Civil War (for instance, "Colonel" Rol-Tanguy).
They were integrated in the FFI in February 1994.