10. Didn't Get The Memo
Everybody knows that World War II ended in August 1945 with Japan's surrender. You've seen all of the photos of the celebrations, particularly in the US. Everybody except for Second Lieutenant Hiroo Onoda. He really should have listened to that briefing!
In December 1944, Onoda was sent with the rest of his unit to The Philippines with orders to do whatever they could to hamper enemy attacks on the island. He was also told, and in no uncertain terms, that he was not to surrender or take his own life. Shortly after the war ended, they started finding leaflets advising that the war had ended, but they believed them to be fake.
In the years that followed, while continuing guerrilla attacks on the island, letters and photos from the families of the men were dropped but they still believed these were fake. Then in 1974, a chance encounter with a Japanese explorer Norio Suzuki brought some light at the end of the tunnel for this strange story. Onoda and Suzuki became friends, but Onoda still refused to surrender stating that he could only surrender to his commanding officer. (Now that's dedication to duty!) On 9 March 1974, Onoda surrendered to his commanding officer, ending a 29-year campaign of terror against the people of the island that they must have been glad to see the back of!
Whether he is a brave man committed to the defence and prosperity of his country, or an absolute loon refusing to believe what his own family was telling him is for you to decide.