History of the First World War in 100 moments

A History of the First World War in 100 Moments: Sealed and delivered

In a single-carriage train at Gottmadingen, a tiny hillside station on the German side of the Swiss border, one of two German officers drew a line across the floor of the carriage corridor. This chalk divide would have the status of an international border, and if the carriage’s most notorious passenger stepped across it, he would be committing treason.