Question: The gentleman who commanded the 1st Provisional Air Brigade was regarded as what?
Sentence (from "1st Provisional Air Brigade"): The 1st Provisional Air Brigade was a temporary unit of the United States Army Air Service, commanded by Col. Billy Mitchell, operating out of Langley Field, Virginia, that was used in to demonstrate the vulnerability of ships to aerial attack when, in July 1921, the "unsinkable" German dreadnought SMS "Ostfriesland" was sent to the bottom of the Atlantic Ocean by bombardment.
Relevant evidence: Yes