Germany declares a war zone around Britain
1915 · Event
Admiral von Pohl announces that U-boats will sink enemy merchant ships in British waters without warning — the first unrestricted submarine campaign.
On these timelines: World War I, Master, Germany, United Kingdom (combined)
More from World War I
- July Crisis 1914 (1914)
- Trench warfare on the Western Front (period) (1914)
- Zimmermann Telegram (1917)
- Fourteen Points speech (1918)
- Hundred Days Offensive (1918)
- Spring Offensive (Kaiserschlacht) (1918)
- Treaty of Brest-Litovsk (1918)
- Sinking of the Lusitania (1915)
Around 1915
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- Spanish flu pandemic (1918)
- Mexican Revolution (1910)
- Scott's Terra Nova expedition (1910)
- Irish revolutionary period (1912)
- Russian Revolution (1917)
- World War I (1914)
- Founding of the Soviet Union (1922)
- Pop music: the 1920s (1920)
- Pop music: the 1910s (1910)