Kaiser calls off unrestricted submarine warfare

Following international protests after the sinking of the Lusitania, Kaiser Wilhelm decides to call off unrestricted submarine warfare in fear of causing more countries join the Entente.

After the Great War began, Germany began using its sizeable U-boat fleet to counter Entente superiority on the seas. The unrestricted submarine warfare led to massive casualties in Entente maritime travel. It also hit ships of neutral countries, causing intense protests, especially after the U-20 sank the RMS Lusitania, a luxury liner carrying both ammunition and civilians to Britain.   Under the pressure of the protests, the Kaiser decided to call the unrestricted submarine warfare off. Germany would not resume this policy until the 1919.