Part 9/15:
By mid-1921, while the mark temporarily stabilized, early signs of economic distress persisted. The division of the ethnically mixed Upper Silesia—a vital industrial region—became emblematic of the ongoing territorial and economic disputes. The League of Nations was tasked with determining its final border after conflicting claims by Poland and Germany, a process that culminated in an October 1921 decision favoring a split that left most of the region in Germany but awarded key industrial assets like coal and iron mines to Poland.