Today in World War II History—September 16, 1939 & 1944

German Army horses towing an infantry gun, Poland, September 1939 (German Federal Archive, Bild 183-S54817)
85 Years Ago—Sept. 16, 1939: In Poland, Germans take Brest-Litovsk and surround Warsaw.
First German U-boat attack on an Allied North Atlantic convoy; U-31 sinks British freighter Aviemore in convoy OB-4 off Land’s End.
German Army Ordnance tasks scientists with exploring nuclear power for bombs or energy; Nuclear Physics Research Group formed, also called Uranverein (Uranium Club).
80 Years Ago—Sept. 16, 1944: Soviets launch assault toward Gulf of Riga on the Baltic.