 Another historic highlight in the Aerospace Age. On July 4, 1942, the first United States bomber attack was made on German-occupied territory. Twelve Allied bombers, six of them manned by American crews, bombed four airdromes in Holland. Air power was decisive in the conquest of Germany and proved that aerospace superiority is the foundation for success in both air and ground offenses. Because of the airplane, military strategy and tactics were radically revised. Almost every military textbook had to be rewritten to reflect the ever-increasing capabilities of air power. As a result of this well-learned lesson, America is expanding its space research and development with the realization that aerospace power is peace power.