When Poland declared its independence in 1918 in the aftermath of WWI, its borders—like many at that time—were not formally determined. By 1920, war had broken out over conflicting expansionist attempts between Soviet Russia and Poland, which wanted its 1772 border restored. The Peace of Riga treaty split contested land between Poland and the Soviets, setting the border and effectively halting Russian expansion into Europe. Where were Poles left on the wrong side of the border sent in the 1930s? Discuss (http://forum.thefreedictionary.com/postst25110_Peace-of-Riga-between-Poland-and-Soviet-Union--1921-.aspx)
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