Sometime in August 1938, the NSKK began its services as a courier for "Organization Todt" (OT) during the construction of the "Westwall". Members of the NSKK transported classified documents, important reports and announcements, construction plans, and routine papers to and from the organization's headquarters. Exemplary services provided to the Organization Todt resulted in Hühnlein being given oversight for the transportation needs related to the task. Over 15,000 trucks went into operation, delivering building materials to the 22,000 individual construction sites of the "Westwall". Daily movements of the 200,000 workers required over 5,000 buses to get the workers to and from the construction sites.