Felice Benuzzi was a P.O.W. in Kenya during WWII. He recruited two others to stage an escape so that he could climb the second highest peak in Africa, knowing that there was no chance of a permanent escape. With scant food and only improvised equipment such as barbed wire crampons, no porters or guns, they traversed the jungle, encountering wild animals, and climb the mountain. Two of them reached a point ~5000 m high on the 5199 m mountain. And then they returned and broke back into the camp, as planned. He later wrote the book based on this, which was made into a fictionalized movie.