aircraft in fact hit the cruiser's port board, while the bombs it had released exploded in the water on her starboard side, causing additional superficial damage. There are different casualty numbers quoted, but the newest research by Tetera indicates eleven men from Emden killed, including two officers, and another thirty wounded; these were among the first casualties of the German fleet during the war. Emden then transferred to the Baltic, where she was assigned to commerce protection duties. She returned to Wilhelmshaven for periodic maintenance from 2 December to 3 January 1940, after which she resumed training duties. During the shipyard period, a degaussing coil was installed just above the waterline to protect the ship from magnetic mines and her anti-aircraft armament was strengthened. After the work was completed, Emden returned to training duties through the winter of 1939–1940. Operation Weserübung As Germany assembled forces for the invasion of Norway, codenamed Operation Weserübung, Emden was allocated to Group 5, which was tasked with seizing Oslo. She joined the group as it began forming in Swinemünde on 12 March. The group consisted of the heavy cruiser , the flagship, the heavy cruiser Lützow, three torpedo boats, and eight R-type minesweepers. On the night of 5 April, Emden and Blücher conducted searchlight training to prepare for night operations. The following day, Emden embarked 600 soldiers and their equipment in Swinemünde before proceeding to the collection point for the invasion fleet, Strander Bucht outside Kiel. At 03:00 on 8 April, Group 5 left Strander Bucht and steamed to the Oslofjord, where they arrived at midnight. After reaching the approaches to the fjord, Emden transferred 350 of the men to the R-boats to allow them to go ashore. The element of surprise was lost, however, and on entering the narrows in the fjord, Blücher was engaged and sunk by Norwegian coastal defenses at Oscarsborg Fortress in the Battle of Drøbak Sound. Lützow was also damaged before the Germans broke off the attack. After the loss of Blücher, Emden and Lützow disembarked their troops further down the fjord so they could attack the coastal defenses from the rear. Once the ground troops had begun their attack, Emden and Lützow closed with the Oscarborg fortress at 15:55 and began providing covering fire. The Germans then negotiated surrender terms with the other Norwegian forces later on 9 April. Emden entered the port on the morning of 10