Read alsoThe Art of Illustration, with 95 illustrations
The second edition, first published in 1896, with 95 black and white illustrations.The London Times said of the first edition, "The Art of Illustration’ is a brightly written account, by a man who has had large experience of the ways in which books and newspapers are illustrated nowadays.... As a collection of typical illustrations by artists of…
The indirect support approach, or air interdiction, was derived from the fundamental beliefs by the Air Corps that attack aviation was best used beyond the battle line and artillery range, against targets more vulnerable and less heavily defended, to further both the Air Force mission and the ground support mission.
As attack doctrine evolved, range and hardened targets became problematic for the single-engine attack plane.
Thus, attack theory and doctrine in terms of the indirect support approach, was adequately developed to be useful at the start of WWII. The use of light and medium bombers in North Africa showed the effectiveness of air interdiction and the indirect approach. Attack aviation had, indeed, established itself before WWII. Attack aviation, in the form of close air support, would have to wait for the lessons of WWII.