Geography and urban development of Dresden past 60 years has made Dresden the fourth largest urban area in Germany after Berlin, Hamburg, and Cologne. The most important river in Dresden is the Elbe river, the only navigable body of water to flow through the city. There are also a number of tributaries such as the river Weißeritz. The nearest German cities are Chemnitz (80 km to the southwest), Leipzig (100 km to the northwest) and Berlin (200 km to the north). The Czech capital Prague is about 150 km to the south; the Polish city of Wrocław is about 200 km to the east. There are
SMS Hamburg 07:40, at which point "Hamburg" and "Stuttgart" were detached to sink their pursuers. At 08:02, "Roon" signaled the two light cruisers and ordered them to abandon the pursuit and retreat along with the rest of the High Seas Fleet. On 21 April 1915, "Hamburg" collided with the German torpedo boat "S21" in the North Sea off the mouth of the Weser river. "Hamburg" was assigned to the IV Scouting Group during the Battle of Jutland on 31 May – 1 June 1916. The IV Scouting Group, under the command of Commodore Ludwig von Reuter, departed Wilhelmshaven at 03:30 on 31