Helgoland-class battleship
The Helgoland class was the second class of German dreadnought battleships. Constructed from 1908 to 1912, the class comprised four ships:Helgoland, the lead ship; Oldenburg; Ostfriesland; and Thüringen. The ships served as a unit in I Division, I Battle Squadron alongside the Nassau-class ships. They saw combat during World War I, including the Battle of Jutland in the North Sea....
