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| 1917 |
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| The British began to use the Scouting Experimental and Bristol Fighter. This period was marked by the spectacular achievements of Manfred von Richthofen (d. April 21, 1918) and by the development of ever larger formations and more intricate tactics. | 1 |
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| 1918 |
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| The Allied superiority became more marked, and American air squadrons began to take part (April). The British did much in the development of large-scale bombardment, especially of munitions centers. At sea much use was made of the airplane for scouting and submarine-chasing. | 2 |
| During these years the Germans continued their raids on England, first with Zeppelins, then with airplanes, with the object of drawing back British air forces from France, of interrupting industry, and of demoralizing the civil population. | 3 |
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