The One Thousand Children (OTC) is a designation, created in 2000, which is used to refer to the approximately 1,400 Jewish children who were rescued from Nazi Germany and other Nazi-occupied or threatened European countries, and who were taken directly to the United States during the period 1934–1945. The phrase "One Thousand Children" only refers to those children who came unaccompanied and left their parents behind back in Europe. In nearly all cases, their parents were not able to escape with their children, because they could not get the necessary visas among other reasons. Later, nearly all these parents were murdered by the Nazis.