Were All of Edmund Hillary's Expeditions Unsuccessful?

No. While Sir Edmund Hillary faced setbacks, his career was defined by historic successes. He is world-renowned for being one of the first two people—alongside Tenzing Norgay—to summit Mount Everest on May 29, 1953.

His earlier expeditions were instrumental stepping stones:

• 1951 British Everest Reconnaissance: Reached the South Col, the highest point attained on Everest at that time. Though they didn't summit, the expedition was deemed a success for pioneering the route.
• 1952 British Cho Oyu Expedition: Abandoned due to severe weather and illness—a genuine failure.

Hillary's legacy includes not only Everest but also later expeditions to the South Pole and extensive humanitarian work in Nepal. His record is a mix of triumph and adversity, not uniform failure.