30 April

1915 (Friday)

 * Second Battle of Ypres: Attempted German advance from St. Julien repulsed.
 * Zeppelin raid on East Anglia.
 * German forces reach the railway stations of the Muravievo and Radziviliski (Province of Kovno, Baltic Provinces).
 * Australian submarine AE2 sunk by Turkish warship in the Sea of Marmora.
 * German warning in USA newspapers re: sailing in RMS Lusitania.