1. Map showing the new boundaries of Hungary : based on Art. 27 of the Treaty of Trianon, signed June 4, 1920 : the map shows all the geographical features mentioned in the treaty text to define the boundary Yale Public content 1920. 2013-01-24T21:14:43Z. 2020-05-07T19:25:21Z. American Geographical Society of New York. English. cartographic image. Public. Hungary and Hungary.