American missionary John Birch was recommended to Chennault for intelligence work by Jimmy Doolittle, whom he had assisted when Doolittle's crew landed in China after the raid on Tokyo. Inducted into the Fourteenth on its formation, and later seconded to the OSS, he built a formidable network of Chinese informants to provide the Flying Tigers with intelligence on Japanese land and sea military positions and the disposition of shipping and railways. He was killed by Chinese communists when he attempted to see a downed plane they had been assigned to guard ten days after the war ended, which led to him being chosen as the namesake of the John Birch Society. The incident is recounted in the memoir of Paul Frillmann, "China: The Remembered Life", who had started the war as the chaplain for the Flying Tigers.