David W. Cloud

“Iraq had forced massive changes to the Army's equipment, training, and strategy. But the most important legacy of the war had been cultural. The war had upended most of the service's basic assumption about how it should fight, undermining the Powell Doctrine with its emphasis on short, intense wars not replacing it with anything nearly so straightforward. Chiarelli wasn't sure he could predict what the next war would look like. But he knew what kind of officers would be needed. He wanted an officer corps that argued, debated, and took intellectual risks. Even that laudable goal was far from accepted within the Army.”
― David Cloud, The Fourth Star: Four Generals and the Epic Struggle for the Future of the United States Army