From Wikipedia, the free encyclopedia
Key to type (fourth column):
A
Attack without prior, formal declaration of war;
S
Severing of diplomatic relations without a formal declaration of war;
U
State of war arrived at through use of ultimatum;
V
Volunteers sent out without a formal declaration of war;
W
Formal declaration of war made.
Date
Initiator nation(s)
Targeted nation(s)
Type
Notes/comments
Document/event
Reference
July 28, 1914
Austria-Hungary
Serbia
W
The Bombing of Belgrade , and by extension the first military action of the war, began at midnight on July 28 and 29.[ 1]
Declaration
[ 2]
August 1, 1914
German Empire
Russian Empire
W
Declaration
[ 3]
August 2, 1914
Luxembourg
A
Invasion started 3 p.m. CET. While Luxembourg never officially declared war, it participated in the Treaty of Versailles .
Invasion
[ 4]
August 3, 1914
France
W
Declaration
[ 3]
August 4, 1914
Belgium
U
Invasion
[ 5]
August 4, 1914
British Empire
German Empire
U
Ultimatum expired at 11 p.m. GMT , and 12 a.m. CET on August 5.[ 6]
Declaration
[ 7]
August 6, 1914
Montenegro
Austria-Hungary
W
Declaration
[ 8]
August 8, 1914
German Empire
W
August 12, 1914
Austria-Hungary
W
June 3, 1915
San Marino
Austria-Hungary
W
San Marino never sent out troops, nor participated in any peace treaties.[ 9]
[ 10] [ 11]
References
^ Rauchensteiner, Manfried (2014). The First World War: and the End of the Habsburg Monarchy, 1914–1918 . Translated by Güttel-Bellert, Anna; Kay, Alex. Böhlau Wien. pp. 142–143. ISBN 978-3-205-79370-0 .
^ Joseph, Franz (July 29, 1914). "Kriegserklärung Österreichs an Serbien" [Austria declares war on Serbia]. Wiener Zeitung (in German). No. 175. Government of Austria-Hungary . p. 1. Retrieved March 16, 2024 .
^ a b "Declaration of War by Germany on Russia (Saturday, August 1, at7.10 P.M.); and on France (Monday, August 3, at 6.45 P.M.)" . The American Journal of International Law . 9 (2): 260–302. 1915. doi :10.2307/2212042 . ISSN 0002-9300 .
^ Otte, Thomas (2014). July Crisis: The World's Descent into War, Summer 1914 . Cambridge University . p. 487. ISBN 978-1-1070-6490-4 .
^ Skinner, Henry; Stacke, Harry (1922). "History of the Great War Based on Official Documents by Direction of the Historical Section of the Committee of Imperial Defence". Principal Events 1914–1918 . Her Majesty's Stationery Office . OCLC 17673086 .
^ Churchill, Winston S. (1938). "X: The Mobiliization of the Navy". The World Crisis 1911-1918 . Vol. 1. Odhams Press . p. 186.
^ "Violation of Belgian Neutrality" . Government of the United Kingdom . August 4, 1914. Retrieved March 16, 2024 .
^ Rappaport, Alfred (1929). "Die Mobilmachung Montenegros im Sommer 1914" [The Mobilization of Montenegro in the Summer of 1914]. Berliner Monatshefte (in German). pp. 941–966.
^ "Guerre Mondiali e Fascismo nella storia di San Marino" [World Wars and Fascism in the History of San Marino]. SanMarinoSite.com (in Italian). April 10, 2014. Archived from the original on April 10, 2014. Retrieved 2024-03-16 .
^ "International law documents, neutrality, breaking of diplomatic relations, war, with notes 1917" . Naval War College . Archived from the original on August 5, 2023. Retrieved March 16, 2024 .
^ "TINY SAN MARINO AT WAR WITH AUSTRIA; Republic Surrounded by Italian Territory Has are Army of About 1,000 Men" . The New York Times . June 4, 1915. p. 3. ISSN 0362-4331 . Retrieved March 16, 2024 .