How did World War 1 change warfare?
A. By introducing the atomic bomb
B. By showing the effectiveness of trench warfare
C. By using tanks, airplanes, and machine guns
D. By demonstrating the success of the blitzkrieg
One way in which World War 1 changed warfare was "C. By using tanks, airplanes, and machine guns," since these changes were part of what made World War I the first real "total war".
