Throughout 1938, while the Nazi persecution of Jews intensified, Kennedy attempted to meet with Adolf Hitler to no avail. In September 1940, he tried again without approval of the Dept of State, “to bring about a better understanding between the US and Germany”. It has been surmised that Kennedy also had personal reasons for wanting to avoid war; "He feared for the lives of his three eldest sons, Joe, Jack and Bobby, all of whom were or soon would be eligible to serve.”