"There's all this debate over whether this image is actually Simpson or not, but it was more about what the medical orderlies did.
"They went out on the frontlines, risking their lives to save other people with the use of the humble donkey.
"I know how much this means to the veterans, so I really did this for them," the artist said.
Whitecliffe landed the job after the RSA decided the wall was dull and boring. Member Tom Downey decided they should put a mural on it and approached the Whitecliffe College of Arts and Design.
Given that Whitecliffe's mother owns the school, she put his name forward.
"I jumped at that opportunity because my grandparents on both sides are returned servicemen," Whitecliffe said. "The least I could do for all the people who gave their lives and served for the country was to do a painting."