The Hindenburg Line (Siegfriedstellung) was a German defensive position of World War I, built during the winter of 1916–1917 on the Western Front, from Arras to Laffaux, near Soissons on the Aisne. In 1916, the Brusilov Offensive had inflicted huge losses on the Austro-Hungarian armies in Russia and forced the German eastern armies to take over more of the Eastern Front. The declaration of war by Romania had placed additional strain on the German war economy and army.