In 1938, Nazi Germany sent an expedition to Antarctica with a mission to investigate sites for a possible base and to make formal claims in the name of the Third Reich. To prepare them for their mission, they invited the great polar explorer Richard E. Byrd to lecture them on what to expect. The following year, a month after hostilities had commenced in Europe, the Germans returned to Neuschwabenland to finish what had been started, with many suggesting that a base was being constructed.