To ensure no changes were made. This is a direct reprint of the original. The purpose of this study is to give U.S. troops a comprehensive picture of German antiaircraft artillery and its use, and at the same time to furnish U.S. antiaircraft artillerymen data by which they can compare German methods with their own. Topics include organization, weapons and equipment, use of antiaircraft artillery with field forces, and use of antiaircraft artillery in defense of Germany and rear areas.