Today is Hiroshima Day. On 6th August 1945, a nuclear bomb was dropped on an inhabited city as an act of war for the first time in human history.
On 6th August 1914, Austria-Hungary declared war on Russia, and Serbia declared war on Germany.
The Royal Serbian Ministry for Foreign Affairs wrote to the German legation at Niš:
The Royal Serbian Ministry for Foreign Affairs has the honour to inform the Imperial Legation that, in view of the state of war which now exists between Serbia and Austria-Hungary, and of that between Russia and Germany, the ally of Austria-Hungary, the Royal Serbian Government, in view of the solidarity of her interests with Russia and her allies, considers the mission of Baron Gieslingen, the Imperial German Minister Plenipotentiary and Envoy Extraordinary, to be at an end. The Royal Serbian Government requests His Excellency to leave Serbian territory with the staff of the Legations. The necessary passports are enclosed herewith.