On This Day

Germany declares war against Portugal

The Kingdom of Portugal had been allied with England since 1373, and thus the Republic of Portugal was an ally of the United Kingdom.

The Kingdom of Portugal had been allied with England since 1373, and thus the Republic of Portugal was an ally of the United Kingdom. However, Portugal remained neutral from the start of World War I in 1914 until early 1916. In that time there were many hostile engagements with Germany. Portugal wanted to meet British requests for aid and protect its colonies in Africa, causing clashes with German troops in the south of Portuguese Angola, which bordered German South West Africa, in 1914 and 1915 (see German campaign in Angola). Tensions between Germany and Portugal also arose as a result of German U-boat warfare, which sought to blockade the United Kingdom, at the time the most important market for Portuguese products.

Historical Significance

The Kingdom of Portugal had been allied with England since 1373, and thus the Republic of Portugal was an ally of the United Kingdom.

Events Before

  1. "The Birth of a Nation" the first 12-reel film in America, directed by D. W. Griffith, starring Lillian Gish and Mae Mar

    "The Birth of a Nation" the first 12-reel film in America, directed by D. W. Griffith, starring Lillian Gish and Mae Marsh, premieres at Clune's Auditorium in Los Angeles

  2. French forces attempt to drive the Germans back into the Champagne region during World War I, gaining a few hundred yard

    French forces attempt to drive the Germans back into the Champagne region during World War I, gaining a few hundred yards at the cost of 50,000 casualties

  3. First military use of poison gas occurs when Germany uses chlorine gas against the Allies along the Western Front at Ypr

    First military use of poison gas occurs when Germany uses chlorine gas against the Allies along the Western Front at Ypres, France in World War I [1]

  4. First landings at Gaba Tepe and Cape Helles on the Gallipoli Peninsula by ANZAC forces during World War I

    The landing at Anzac Cove on Sunday, 25 April 1915, also known as the landing at Gaba Tepe and, to the Turks, as the Arıburnu Battle, was part of the amphibious invasion of the Gallipoli Peninsula by...

  5. RMS Lusitania is sunk by a German submarine off the southern coast of Ireland, with 1,198 lives lost

    RMS Lusitania is sunk by a German submarine off the southern coast of Ireland, with 1,198 lives lost

Events After

  1. Sculptor Auguste Rodin (76) weds Rose Beuret

    Sculptor Auguste Rodin (76) weds Rose Beuret

  2. First major strike of the Russian "February Revolution" starts at the giant Putilov factory in Petrograd [NS=Mar 3]

    First major strike of the Russian "February Revolution" starts at the giant Putilov factory in Petrograd [NS=Mar 3]

  3. First jazz records are recorded: "Dixie Jazz Band One Step" and "Livery Stable Blues" by the Original Dixieland Jass Ban

    First jazz records are recorded: "Dixie Jazz Band One Step" and "Livery Stable Blues" by the Original Dixieland Jass Band for the Victor Talking Machine Company in NYC

  4. First major strike of the Russian "February Revolution" starts at the giant Putilov factory in Petrograd [OS=Feb 18]

    First major strike of the Russian "February Revolution" starts at the giant Putilov factory in Petrograd [OS=Feb 18]

  5. First jazz record is released on a 78 by the Original Dixieland Jass Band for the Victor Talking Machine Company ("Dixie

    First jazz record is released on a 78 by the Original Dixieland Jass Band for the Victor Talking Machine Company ("Dixie Jazz Band One Step" on one side, "Livery Stable Blues" on the other)

More from the 1910s

Frequently Asked Questions

What happened on March 9, 1916?
The Kingdom of Portugal had been allied with England since 1373, and thus the Republic of Portugal was an ally of the United Kingdom. However, Portugal remained neutral from the start of World War I in 1914 until early 1916. In that time there were many hostile engagements with Germany.
Why is Germany declares war against Portugal significant?
The Kingdom of Portugal had been allied with England since 1373, and thus the Republic of Portugal was an ally of the United Kingdom.

Explore More