On this day in 1944, Soviet troops in Lithuania trying to take the town of Ukmerge ran into unexpectedly heavy resistance when they encountered a pro-Nazi volunteer militia on the outskirts of the town; the battle to drive them out would last four days. In Estonia Soviet forces wiped out the last pockets of Nazi resistance in Tallinn; in Poland anti-Nazi partisans launched a guerrilla campaign to liberate the Polish capital, Warsaw.