WHAT HAPPENED IN 1870.
Look what happened the 1870.

US Congress created the United States Department of Justice (22. June 1870)

The Christian holiday of Christmas is declared a federal holiday in the United States. (26. June 1870)

The United States Department of Justice formally comes into existence. (1. July 1870)

Reconstruction Era of the United States: Georgia becomes the last of the former Confederate states to be readmitted to the Union. (15. July 1870)

Rupert's Land and the North-Western Territory are transferred to Canada from the Hudson's Bay Company, and the province of Manitoba and the Northwest Territories are established from these vast territories. (15. July 1870)

The First Vatican Council decrees the dogma of papal infallibility. (18. July 1870)

Franco-Prussian War: France declares war on Prussia. (19. July 1870)

Tower Subway, the world's first underground tube railway, opens in London, England, United Kingdom. (2. August 1870)

Franco-Prussian War: the Battle of Spicheren is fought, resulting in a Prussian victory. (6. August 1870)

Franco-Prussian War: the Battle of Wörth results in a decisive Prussian victory. (6. August 1870)

The Republic of Ploiești, a failed Radical-Liberal rising against Domnitor Carol of Romania. (8. August 1870)

Franco-Prussian War: The Battle of Mars-la-Tour is fought, resulting in a Prussian victory. (16. August 1870)

Franco-Prussian War: Battle of Gravelotte is fought. (18. August 1870)

The Wolseley Expedition reaches Manitoba to end the Red River Rebellion. (24. August 1870)

Franco-Prussian War: the Battle of Sedan is fought, resulting in a decisive Prussian victory. (1. September 1870)

Franco-Prussian War: Battle of Sedan – Prussian forces take Napoleon III of France and 100,000 of his soldiers prisoner. (2. September 1870)

Franco-Prussian War: the Siege of Metz begins, resulting in a decisive Prussian victory on October 23. (3. September 1870)

Emperor Napoleon III of France is deposed and the Third Republic is declared. (4. September 1870)

Louisa Ann Swain of Laramie, Wyoming becomes the first woman in the United States to cast a vote legally after 1807. (6. September 1870)

Old Faithful Geyser is observed and named by Henry D. Washburn during the Washburn-Langford-Doane Expedition to Yellowstone. (18. September 1870)