Upper Saxony
It was particularly to distinguish the lands from 'Lower Saxony', a concept which arose later in popular usage (though never enforced) as a term for the original Saxon lands in north and west Germany (where Low German dialects had spread), in what is now the state of Lower Saxony, as well as the adjacent Westphalian region, Holstein and the western part of today's Saxony-Anhalt north of the Harz range (Eastphalia).
Saxony
After King Frederick Augustus III of Saxony abdicated on 13 November 1918, Saxony, remaining a constituent state of Germany (Weimar Republic), became the Free State of Saxony under a new constitution enacted on 1 November 1920. In October 1923 the federal government under Chancellor Gustav Stresemann overthrew the legally elected SPD-Communist coalition government of Saxony. The state retained its name and borders during the Nazi era as a (Gau Saxony), but lost its quasi-autonomous status and its parliamentary democracy.