Shortly before 1986, Waldheim published an autobiography. During his campaign to become president in 1986, it became public that some statements in that biography were not true. These were about his past. Waldheim was an officer for Germany in the Second World War. He rose to be an oberleutnant in the Wehrmacht. Much historical interest has centered on Waldheim's role in Operation Kozara in 1942. According to one post-war investigator, prisoners were routinely shot within only a few hundred meters (yards) of Waldheim's office, and away at the Jasenovac concentration camp. Waldheim later stated that "he did not know about the murder of civilians there".