Ostmark was a name that referred historically to the Margraviate of Austria, a medieval frontier march. It was also used in Nazi propaganda from 1938 to 1942 to refer to the formerly independent Feder
1938 postage stamp showing a German and Austrian embracing with the date "10 April 1938," marking the sham referendum that legalised the Anschluss. The text translates as, "1 May 1938: The Eastern March celebrates the Day of National Labour!"