Historical
1868: United States - The 14th Amendment to the U.S. Constitution was approved
1868: United States - The Expatriation Act is approved by Congress, guaranteeing U.S. citizens the right to expatriate, coupled with the 14th Amendment to the U.S. Constitution approved only one day later, the Expatriation Act allows U.S. citizens to renounce federal citizenship in order to regain Constitutional rights ceded by U.S. citizens as defined by the 14th Amendment
1869: Egypt - The Suez Canal opens linking the Mediterranean to the Red Sea
1869: United States - First Transcontinental Railroad completed in United States on May 10
1870-1871: France, Germany, Italy - The Franco-Prussian War results in the unifications of Germany and Italy, the collapse of the Second French Empire, the breakdown of Pax Britannica, and the emergence of a New Imperialism
1870s-1890s: Europe, United States - Long Depression in Western Europe and North America
1871-1872: Iran - Famine in Persia is believed to have caused the death of two million
1871-1914: Europe, United States - Second Industrial Revolution, also known as the Technological Revolution, a phase of the larger Industrial Revolution in the period from the last half of the 19th century until about the time of World War I
1872: United States - Yellowstone National Park is created
1873: England - James Clerk Maxwell publishes "A Treatise on Electricity and Magnetism", a set of four partial differential equations describing how the electric and magnetic fields relate to their sources, charge density and current density, and how they develop with time
1874-1875: Spain - First Republic in Spain
1874: France - The Societe Anonyme Cooperative des Artistes Peintres, Sculpteurs, and Graveurs, better known today as the Impressionists organize and present their first public group exhibition at the Paris studio of the photographer Nadar
1874: India, England - The British East India Company is dissolved
1875-1900: India - 26 million in India perish due to famine
1876-1879: China - 13 million die of famine in northern China
1876-1914: United States - The massive expansion in population, territory, Industry and wealth in the United States is referred to as the Gilded Age
1876: Bulgaria - The Bulgarian revolt against Ottoman rule
1877-1878: Europe - Following the tenth Russo-Turkish War, the Treaty of Berlin recognizes formal Independence of the Principality of Serbia, Montenegro and Romania, Bulgaria becomes autonomous
1877: United States - Great Railroad Strike in the United States may have been the first nationwide labor strike
1878: United States - First commercial telephone exchange in New Haven, Connecticut
1879-1883: Chile, Peru, Bolivia - Chile battles with Peru and Bolivia over Andean territory in the War of the Pacific
1879: South Africa - Anglo-Zulu War in South Africa
1880-1881: England, South Africa - the First Boer War between England and the Dutch-speaking Inhabitants of South Africa