Given the task definition and input, reply with output. In this task, you are given a context paragraph, a question based on that and corresponding answer of a question. Your task is to generate supporting fact/knowledge from context paragraph which helps in answering a given question.

James Harold Doolittle (December 14, 1896 September 27, 1993) was an American aviation pioneer. A Reserve officer in the United States Army Air Corps, Doolittle was recalled to active duty during World War II. He was awarded the Medal of Honor for personal valor and leadership as commander of the Doolittle Raid, a bold long-range retaliatory air raid on the Japanese main islands, on 18 April 1942, four months after the Attack on Pearl Harbor. He was eventually promoted to lieutenant general and commanded the Twelfth Air Force over North Africa, the Fifteenth Air Force over the Mediterranean, and the Eighth Air Force over Europe. Question: Jonna Doolittle Hoppes is an American author whose works include oral histories and biographies, granddaughter of aviation pioneer and United States Air Force General James Harold Doolittle (December 14, 1896 September 27, 1993) was an American aviation pioneer, active duty during which event? Answer: World War II
A Reserve officer in the United States Army Air Corps, Doolittle was recalled to active duty during World War II.