Horden also appeared in I WAS MONTY'S DOUBLE in which the real-life Lieutenant M.E. Clifton James, an actor before World War II, impersonated General Bernard Montgomery in order to fool the Nazis about the real location of the D-Day invasion.
Also, Hordern, like his character, Vice Admiral Rolland, served in the Royal Navy during the war. Lieutenant Commander Hordern served on the aircraft carrier HMS Illustrious.
In WHERE EAGLES DARE, Michael Hordern played Vice Admiral Rolland, who devised a plan to expose Nazi double agents in MI6 by having American Corporal Cartwright Jones impersonate D-Day planner Brigadier General George Carnaby.

IN WHERE EAGLES DARE, Robert Beatty played actor and Corporal Cartwright Jones impersonating D-Day planner Brigadier General George Carnaby.

In I WAS MONTY'S DOUBLE, Horden played the governor of Gibralter in the British plan to fool the Nazis about the real location of the D-Day invasion.

In I WAS MONTY'S DOUBLE, actor and Lieutenant M.E. Clifton James played himself impersonating General Bernard Montgomery in order to fool the Nazis about the real location of the D-Day invasion.

Hordern, like his character, Vice Admiral Rolland, served in the Royal Navy during the war. Lieutenant Commander Hordern served on the aircraft carrier HMS Illustrious.
