 The outbreak of the First World War in 1914 caused further delays as a number of components had been ordered from foreign manufacturers . As an example , the gun turrets rested on 8 @-@ inch ( 203 mm ) roller bearings made in Germany , but attempts to order replacements from the United Kingdom and Sweden proved futile , as no company was willing and able to make the bearings . Components for the turbines of Navarin and Izmail that had been ordered from AG Vulcan in Germany were seized by the German government at the beginning of the war and used in the construction of the two Brummer @-@ class cruisers . 
