The Battle of Groningen took place during the final month of the Second World War, from April 13 to 16, 1945, in the city of Groningen between a mixture of German soldiers, Dutch and Belgian SS troops numbering 7,000 against the entire 2nd Canadian Infantry Division, though the whole division was never in combat at any given time. There were also substantial amounts of Luftwaffe units manning flak guns in the area. Groningen was also the site of the headquarters for the Sicherheitsdienst in the North of the Netherlands. The German command structure was poor and the defenders had never exercised together.