Question

Meaning of " of the terms it was forced to accept after Germany's defeat at the end of the First World War"

Answer 1

 The terms(the Versailles Treaty) it (Weimar Republic) was forced to accept after Germany's defeat at the end of the First World War.

Germany lost 13.5 % of its territory under the terms of the treaty. Close to seven million German citizens were placed under the jurisdiction of a foreign nation:
France: France took Alsace and Lorraine and the German coal mines in the Saar Region for fifteen years. The Saar region was a highly industrialized region.Poland: the state of Poland was recreated. Poland took most of West Prussia and much of the Posen province. Upper Silesia was ceded to Poland, but later returned to Germany under a plebiscite. The Polish Corridor was made of land that belonged to Germany before WWI.Belgium: Small areas of Eupen, Malmèdy, Moresńet, St. VithDenmark: Northern Schelswig was ceded to Denmark under article 27 of treaty.Czechoslovakia: border area near Troppau (present day Opava)

The League of Nations took control of the free city of Danzig and the allies took control of the Rhineland for fifteen years. The Rhineland was demilitarised under article 180 of the Versailles Treaty. It was considered the industrial heart of Germany and the source of its military power. Germany also lost its colonies and large merchant vessels.

 The infant Weimar republic was not able to take the pressure of the treaty well and collapsed.