What did the Pentagon Papers reveal?

The Pentagon Papers revealed significant deception in U.S. government war narratives regarding the Vietnam War. This top-secret Department of Defense study documented the United States' political and military involvement in Vietnam from the end of World War II until 1967, highlighting that the government had misled the public and Congress about the war's progress and the likelihood of its success. The revelations sparked widespread public outrage and intensified anti-war sentiment, as citizens learned that leaders had often downplayed the realities of the conflict and misrepresented U.S. engagement in Vietnam.

This answer is crucial because it underscores the historical significance of the Pentagon Papers in shaping public opinion and policy surrounding the Vietnam War, ultimately contributing to the growing distrust of the government. The other options do not accurately capture the core revelations of the Pentagon Papers; for instance, they did not celebrate successes, provide withdrawal plans, or include casualty reports, though these were also important aspects of the war's context.