Primary Leadership Development Course is a US Army leadership course taught to Specialists and Corporals (and those who have passed a selection board for Sergeant) (e.g. soldiers in grade E-4) that prepares soldiers for rudimentary supervisory tasks.
PLDC is non-MOS-specific two- or four-week program for Reserve or Active Component personnel, respectively. It is offered at a number of Army bases throughout the continental United States and Germany. While most of the course is classroom learning and testing, a multi-day, comprehensive field training exercise is required to receive a diploma for PLDC.
This introductory course is required for promotion to full sergeant (E-5), even though E-4s can be selected for sergeant stripes and then take the course. PLDC is also a prerequisite for the subsequent Noncommissioned Officer Academy courses such as Basic NCO Course (required for promotion to Staff Sergeant and Sergeant First Class) and Advanced NCOC (itself a prereq to be a Master Sergeant).