Noun
a European river; flows into the Baltic Sea
Source: WordNetThe other major formation in Army Group Vistula was the aristocratic General Hasso Freiherr (Baron) von Manteuffel’s Third Panzer Army, on the Oder River to the north of the Ninth Army and stretched as far as Stettin. Source: Internet
He later wrote, “Troops were expected to break through a deeply echeloned defense zone extending from the Oder River all the way to heavily fortified Berlin. Source: Internet