Air Service, United States Army Major Charles John Biddle (13 May 1890 – 22 March 1972) was an American aviator, attorney, and author.

His grandfather Charles John Biddle (1819–1873) was a soldier in the Union Army and subsequently a member of the United States House of Representatives.

Biddle initially fought several indecisive combats with a Spad VII, but success evaded him until 5 December 1917.

He shot down three more enemy planes afterwards-his 5th official credit was a Rumpler CIV of Fliegerabteilung 46LB {pilot Eichler {POW} observer Gröschel {DOW} August 16, 1918.

At a trial in Trenton, New Jersey, he argued successfully for Merck's acquittal with Thomas E. Dewey who represented Eli Lilly.

This case was the first in which the government claimed national security privileges for its documents, as the B-29 was carrying out experiments with radar control of airborne drones.

[9] The U. S. Supreme Court examined its own prior decision of the case; the government claim was exposed as a fraudulent one used to cover up neglect in maintenance and poor air crew training as the cause of the accident.

During an engagement between 11 Spads and 12 enemy Fokkers, Captain Biddle, perceiving a comrade in distress from the attack of two planes, dived upon them and by his fire forced them to withdraw.

60, W.D., 1920[6]) Ordre de Léopold citation For extraordinary heroism in action on 12 April 1918 near Corbeny, France, and on 15 May 1918, near Ypres, Belgium.

Captain Biddle has daily shown himself an excellent and remarkable example of courage, energy and skill, leading his pilots to the attack at every opportunity and making his flight a most efficient one.