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War at Sea - Coggle Diagram

- - - - Other aim of u-boats was to reduce the fleet of British ships
      - German u-boat fleet only 23 at start of war
      - Began to use unrestricted submarine warfare, targeting all ships in British waters, and u-boat sinking went up significantly
        
        One boat sunk was the Lusitania, a passenger liner - among 1200 dead were 128 Americans
        
        Lusitania sinking used as one of the reasons for USA to declare war on Germany
- - - - Germany was unable to import raw materials, devastating for both war effort and village life
        
        Unable to expand fleet due to lack of materials
        
        Reduced fertilizer imports, and many foods became very scarce due to this
        
        Winter of 1917 known as "Turnip Winter", 76000 deaths
        
        Food riots and loss of control over German people, devastated German economy, caused unrest that contributed to revolutionary action in 1918
    - - Convoy system - groups of ships sailing together with warships for protection
      - Smoke screens, camouflage worked well as there was no radar at the time
      - Warships disguised as merchant ships, depth charged
- - - - When the war ended, Germany scuttled their entire fleet rather than hand them over to the British at Scapa Flow in January 1919