The Basic Leader Course (BLC),[1][2] formerly the Warrior Leader Course (WLC) and Primary Leadership Development Course (PLDC), is the first course of study in the US Army noncommissioned officer Professional Development System (NCOPDS). BLC is a month-long course that trains specialists and corporals in the fundamentals of leadership.[3] As of 1 July 2021, all corporals are to have already completed BLC; in the interim those corporals who have not yet completed BLC are reassigned as specialists until they have passed the NCO promotion boards for junior leadership; specialists who have completed BLC and have been recommended for promotion are to wear corporal rank before their recommended promotion.[4]