11-12th May 1945 near Příbram, Czechoslovakia.
I guess it's little known event but in fact it was a real battle in terms of scale. While the German capitulation was signed already on 8th May the war continued in Czechoslovakia for coupple more days. Fighting in Prague ceased finally on 9th May but the German units didn't want to surrender to the Red Army and intended to fight their way to the Americans. Quite a strong group of them found themseves south-east of Příbram. Roughly 6-7 thousand soldiers from various SS and Wehrmacht units, mainly remains of SS Kampfgruppe Wallenstein,