The early 1970s were transitional years as the agency shifted its focus from consolidating its functions to establishing itself as a credible producer of national-level intelligence. This proved difficult at first since sweeping manpower decrements between 1968 and 1975 had reduced agency manpower by 31 percent and precipitated mission reductions and a broad organizational restructuring. Challenges facing DIA at this time included the rise of Ostpolitik in Germany; the emergence of the Palestine Liberation Organization in the Middle East; and the U.S. incursion into Cambodia from South Vietnam.