Bradley Reardon Walker DFC was born at Hamilton, Ontario (ON). On 27 May, 1940 he enlisted in the RCAF in London, ON.

He received air crew instruction at various training schools in Canada and on January 20, 1941, graduated as a pilot, from No. 2 Service Flying Training School at Ottawa (Uplands) ON.

After arriving overseas in 1941 and receiving further training he was posted to no. 403 Squadron Fighter Command. On June 14, 1942 he completed his first tour of operations and was awarded the Distinguished Flying Cross (DFC). His citation reads as follows:

"Flight Lieutenant Walker completed 14 operational sorties before joining his present squadron. He has since participated in 38 fighter sweeps over France and has led the squadron on three occasions. In April 1942, he led a flight in a successful attack made by the squadron against a formation of enemy airccraft. One hostile aircraft was destroyed and several others damaged. Flight Lieutenant Walker has proved himself to be a courageous and skilful leader and has set a fine example for all."

For his skill and courage during his first tour, the United States government decorated him with the USA Air Medal on August 27, 1943.

After completing his first tour of protect and attack missions, Walker volunteered for a second tour and was posted to Squadron No. 14 based at Amchitka in the Aleutian Islands. For his skill and courage against the Japanese, he was "Mentioned In Despatches". His citation reads as follows:

"Squadron Leader Walker, as commander of a fighter squadron actively engaged in fighter-bomber operations against the Japanese, has by his fine leadership and excellent example inspired and developed his unit into a fighter squadron of high quality. He personally has led his men on many operational sorties against enemy installations."