1870

File:Decade.png ( 1870s: ) 1870
File:Decade.png ( 1870s: ) 1870 link
	year 1870

1860 < 1861 < 1862 < 1863 < 1864 < 1865 < 1866 <1867 < 1868 < 1869 < 1870 > 1871 > 1872 > 1873 > 1874 > 1875 > 1876 > 1877 > 1878 > 1879 > 1880

Events

January 10 – John D. Rockefeller incorporates Standard Oil.
February 9 – The U.S. Army Weather Bureau is created within the Army Signal Corps.
February 12 – Women's suffrage: Women gain the right to vote in Utah Territory.
February 23 – Military control of Mississippi ends, and it is readmitted to the Union.
February 26 – In New York City, the first pneumatic subway is opened, Beach Pneumatic Transit.
February 26 – The German Commerzbank is founded in Hamburg.
February 27 – The circle of the sun flag of Japan is adopted as the national flag for Japanese merchant ships, by proclamation of the Daijō-kan.
March – The Mitsubishi Company is established in Japan as a shipping firm, by Iwasaki Yatarō with Thomas Blake Glover.
March 1 – Battle of Cerro Corá, Paraguay: Marshal Francisco Solano López's last troops are cornered by those of the Triple Alliance. López refuses to surrender and is killed, ending the Paraguayan War.
March 4 – Red River Rebellion: Thomas Scott is executed by Louis Riel's provisional government, in modern-day Manitoba, Canada.
March 10 – The Deutsche Bank is founded in Berlin.
March 18 – Female Infanticide Prevention Act, 1870, passed in British India.

July 14 – The Ems Dispatch is published, serving as casus belli for a war between Prussia and France.
July 15 - Reconstruction Era: Georgia becomes the last former Confederate state to be readmitted to the Union.
July 18 – Pastor aeternus: Pope Pius IX declares papal infallibility, in matters of faith and morals.
July 19 – Franco-Prussian War: France declares war on Prussia.
July 30 – The 'Diggers' Republic' is proclaimed at Klipdrift in South Africa by diamond miners, with Stafford Parker as president.
August 8 – The Republic of Ploiești, an uprising against Domnitor Carol of Romania, fails.
August 24 – The Red River Rebellion in Canada ends with the arrival of the Wolseley Expedition and the flight of Louis Riel.
September 2 – Franco-Prussian War: Battle of Sedan – Prussian forces defeat the French armies, and take Emperor Napoleon III and 100,000 of his soldiers prisoner at Sedan.
September 4 – Emperor Napoleon III of France is deposed, and the Third Republic is declared. Empress Eugénie flees to England with her children.
September 19 – Franco-Prussian War: The Siege of Paris begins.
September 20 – With Bersaglieri soldiers entering Rome at Porta Pia, the unification of Italy is completed, ending the last remnant of the Papal States and Papal temporal power.

October 2 – A plebiscite held in Rome supports, by 133,681 votes to 1,507, the annexation of the city by Italy.
October 6 – Rome becomes the capital of Italy.
October 8 – Léon Gambetta escapes besieged Paris in a hot-air balloon.
October 20 – The First Vatican Council adjourns.
October 26 – The Chinese leaders of June's Tianjin Massacre of foreigners are executed by the China's Imperial government.
October 27 – Franco-Prussian War: Siege of Metz – Marshal François Achille Bazaine, commanding the French left wing, is forced by starvation to surrender the fortifications of Metz.
November 12 – Dresdner Bank is founded in Germany.
November 16 – The Spanish Cortes Generales proclaims Amadeo de Saboya as King Amadeus I of Spain.
December 28 – Juan Prim, prime minister of Spain, is shot by unknown assassins on leaving the Cortes, dying two days later.
December 31
- Sir Henry Barkly is appointed Governor of the Cape of Good Hope, and High Commissioner for Southern Africa.
- The 12.8 km (8.0 mi) Fréjus Rail Tunnel through the Alps is completed.