European War Office

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The European War Office (Spanish: Oficina de la Guerra Europea or Oficina Pro Cautivos) was a humanitarian office created by King Alfonso XIII of Spain to help the victims of the First World War, regardless of their allegiance, or whether they were of military or civilian status. The War Office was governed directly by the Private Secretary of the King; it was based in the Royal Palace of Madrid.

One of the King's most imperative achievements was to create a compromise between both sides of the conflict, to prevent the further sinking of hospital ships. As consequence of this, Spanish naval observers sailed hospital ships of various countries, in order to ensure that the vessels were being used for their intended purpose, as opposed to military expeditions. The King also collaborated in the creation of a dedicated signal code for hospital ships.^[1]