Throughout aviation history, certain aircraft have stood out not only for their speed and agility but also for their unparalleled armor and resilience. These warbirds, designed to withstand the ...

To manufacture thousands of airplanes for its World War I allies, the United States would fell acres of spruce.

By war’s end, 13 Army Air Service squadrons, five of them bomber squadrons, were equipped with DH-4s. On May 11, 1918, the first DH-4 Liberty airplanes were delivered to France.