Ancestry.com family of Maria (Mays) Clendenin and her husband Samuel G. Clendenin with their 7 children including ancestor Elizabeth Clendenin. This family living shown in Tennessee (with one child born in Illinois). 

Ancestry.com family of Mariah Mayes [i.e. Maria Mays] the wife of Samuel Clendenin and their daughter Eliza Ann Clendenin. Her parents are listed as Wiley Mayes and Susannah Powell but their trees have their first child as Elmira who married Alexander Milstead. 

Ancestry.com family of Rachel (Woody) Clendenin, wife of Thomas C. Clendenin and daughter of Samuel T. Woody Sr. and Jane Holmes. Rachel and Thomas had ten children including ancestor Elizabeth (Clendenin) Deaton. Per familysearch.org, at least three dozen ancestors of Rachel can be tracked back into the various countries of the United Kingdom. 

Ancestry.com family of Samuel G. Clendenin and his first wife Maria (Mays) Clendenin with their 7 children, his second wife Jane Clendenin and their one child. With his first wife they had ancestor Elizabeth Clendenin. This family living shown in North Carolina and Tennessee (with one of the earlier children born in Indiana). 

Ancestry.com family of Thomas C. Clendenin and his first wife Rachel (Woody) Clendenin with their 10 children, his second wife Mary (Gallin) Clendenin and their 7 children, his third wife Melvina Elizabeth (Dorton) Clendenin (she had a twin) and their 5 children. With his first wife they had ancestor Samuel G. Clendenin. This family living shown in North Carolina and Tennessee.

Historical
1820: Liberia - Liberia founded by the American Colonization Society for freed American slaves
1820: United States - Missouri Compromise admits Missouri as a slave state and Maine as a free state
1821-1830: Greece, Turkey - Greece becomes the first country to break away from the Ottoman Empire after the Greek War of Independence
1821: Mexico, Spain - Mexico gains Independence from Spain with the Treaty of Cordoba
1821: Peru, Spain - Peru declares Its Independence from Spain
1822-1823: Mexico - First Mexican Empire, as the first post-independent Mexican government, ruled by Emperor Agustin I of Mexico
1822: Brazil, Portugal - Prince Pedro of Portugal proclaimed the Brazilian Independence on September 7, on December 1, he was crowned as Emperor Dom Pedro I of Brazil
1823-1887: England, Burma - The British Empire annexed Burma (now also called Myanmar) after three Anglo-Burmese Wars
1825-1828: Argentina, Brazil, Uruguay - The Argentina-Brazil War results in the Independence of Uruguay
1825: United States - Erie Canal opened connecting the Great Lakes to the Atlantic Ocean
1826-1828: Russia, Iran - After the final Russo-Persian War, the Persian Empire took back territory lost to Russia from the previous war
1827: England - Death of William Blake, an English poet, painter, and printmaker who Influenced literature
1828-1829: Russia, Turkey - Russo-Turkish War (ninth of ten), Russian victory
1830: Belgium, Netherlands - The Belgian Revolution in the United Kingdom of the Netherlands led to the creation of Belgium
1830: Colombia, Venezuela, Ecuador - Greater Colombia dissolved and the nations of Colombia (including modern-day Panama), Ecuador, and Venezuela took Its place
1830: France - July Revolution in France
1830: Poland, Russia - November Uprising in Poland against Russia
1830: United States - The Church of Jesus Christ of Latter Day Saints is established on April 6, 1830
1831-33: Egypt - Egyptian-Ottoman War
1831: France, Algeria - France Invades and occupies Algeria
1833-1876: Spain - Carlist Wars in Spain
1833: England - Slavery Abolition Act bans slavery throughout the British Empire
1834-1859: Russia - Rebellion led by Imam Shamil in Russian-occupied Caucasus
1834: Germany - The German Customs Union is formed
1834: Spain - Spanish Inquisition officially ends
1835-1836: United States, Mexico - The Texas Revolution in Mexico resulted in the short-lived Republic of Texas
1836: United States, Mexico - The Battle of the Alamo
1837-1838: Canada - Rebellions of 1837 in Canada
1837-1901: England - Reign of Queen Victoria is considered the apex of the British Empire and is referred to as the Victorian era
1838-1840: Central America - Civil war in the Federal Republic of Central America led to the foundings of Guatemala, El Salvador, Honduras, Nicaragua, and Costa Rica
1839-1851: Uruguay - Uruguayan Civil War
1839-1860: France, England, United States, Russia, China - After two Opium Wars, France, the United Kingdom, the United States and Russia gained many concessions from China resulting in the decline of the Qing Dynasty
1840: New Zealand, England - New Zealand is founded, as the Treaty of Waitangi is signed by the Ma-ori and British
1844: Haiti - Dominican War of Independence from Haiti
1844: Iran - Persian Prophet the Bab announces his revelation on May 23, founding Babism, he announced to the world of the coming of "He whom God shall make manifest", he is considered the forerunner of Baha u llah, the founder of the Baha I Faith
1844: United States - First publicly funded telegraph line in the world, It is between Baltimore and Washington and sends demonstration message on May 24, ushering in the age of the telegraph, this message read "What hath God wrought?" (Bible, Numbers 23:23)
1844: United States - Millerite (followers of the teachings of William Miller) movement awaits the Second Advent of Jesus Christ on October 22, the non-appearance of Christ becomes known as the Great Disappointment
1845-1846: Pakistan - First Anglo-Sikh War in Punjab (Pakistan) between the Sikh Empire and the British East India Company
1845-1849: Ireland - The Irish Potato Famine led to the Irish diaspora
1845-1872: New Zealand - The New Zealand Land Wars
1845: Tonga - Unification of the Kingdom of Tonga under Ta-ufa?a-hau (King George Tupou I)
1846-1847: United States - Mormon migration to Utah
1846-1848: United States, Mexico - The Mexican-American War leads to cession by Mexico of much of the modern-day Southwestern United States
1847-1901: Mexico - The Caste War of Yucatan
1848-1849: Pakistan - Second Anglo-Sikh War in Punjab (Pakistan) between the Sikh Empire and the British East India Company, this war basically ends the Sikh Empire
1848-1858: United States - California Gold Rush
1848: Europe - Revolutions of 1848 in Europe as some type of revolution occurred in most all European countries (except England and the Netherlands), the revolutions were quickly put down as they were mostly unorganized peasants
1848: Russia - The Communist Manifesto published
1848: United States - Seneca Falls Convention is the first rights for women convention in the United States and leads to the battle for suffrage and legal rights for women
1850: Europe - The Little Ice Age ends around this time
1851-1852: South America - The Platine War (also known as the War against Oribe and Rosas) fought between the Argentine Confederation and an alliance consisting of the Empire of Brazil, Uruguay and the Argentine provinces of Entre Rios and Corrientes, the war was part of a long-running contest between Argentina and Brazil for Influence over Uruguay and Paraguay, and hegemony over the regions bordering the Rio de la Plata (River Plate), the conflict took place in Uruguay, on the Rio de la Plata and in the northeast of Argen
1851-1864: China - The Taiping Rebellion in China is the bloodiest conflict of the century
1851-60s: Australia - Victorian gold rush in Australia
1851: England - The Great Exhibition in London was the first International Expo or Worlds Fair
1853-1856: Ukraine, France, England, Turkey, Russia - Crimean War between France, the United Kingdom, the Ottoman Empire and Russia
1854: Japan - The Convention of Kanagawa formally ends policy of Isolation by Japan
1855: England - Henry Bessemer Invents a process that enables steel to be mass produced from molten pig Iron
1856: Romania - First oil refinery in Romania
1857-1858: India - Indian Rebellion of 1857 (also known as First War of Independence for India, the Great Rebellion, the Indian Mutiny, the Revolt of 1857, the Uprising of 1857, the Sepoy Rebellion and the Sepoy Mutiny), It began as a mutiny of native soldiers (sepoys) employed by the British East India Company's army
1859: England - Charles Darwin publishes "The Origin of Species", It is a work of scientific literature considered to be the foundation of evolutionary biology, Its full title is "On the Origin of Species by Means of Natural Selection, or the Preservation of Favoured Races in the Struggle for Life", It presents a body of evidence that the diversity of life arose by common descent through a branching pattern of evolution and Includes evidence Darwin gathered on the Beagle expedition in the 1830s and his subsequent findings
1861-1865: United States - American Civil War between the Union and seceding Confederacy
1861-1867: France, Mexico - French Intervention in Mexico and the creation of the Second Mexican Empire, ruled by Maximilian I of Mexico and his consort Carlota of Mexico
1861: Russia - Russia abolishes serfdom
1862-1877: China - Muslim Rebellion in northwest China
1863-1865: Poland, Russia - Polish uprising against the Russian Empire
1863: Iraq - Baha u llah declares His station as "He whom God shall make manifest", this date is celebrated in the Baha I Faith as The Festival of Ridvan
1863: Switzerland - Formation of the International Red Cross is followed by the adoption of the First Geneva Convention in 1864
1864-1866: Peru, Chile, Spain - The Chincha Islands War was an attempt by Spain to regain Its South American colonies in Peru and Cile
1864-1870: Paraguay - The War of the Triple Alliance ends Paraguayan ambitions for expansion and destroys much of the Paraguayan population
1865-1877: United States - Reconstruction in the United States, slavery is banned in the United States by the Thirteenth Amendment to the United States Constitution
1865: United States - April 14, 1865, United States President Abraham Lincoln is assassinated while attending a performance at Fords Theater, Washington, D.C., he dies approximately nine hours after being shot on April 15, 1865
1865: United States - April 9, 1865 Robert E. Lee surrenders the Army of Northern Virginia (26,765 troops) to Ulysses S. Grant at Appomattox Courthouse, Virginia, effectively ending the American Civil War
1866-1868: Finland - Famine in Finland
1866-1869: Japan - After the Meiji Restoration, Japan embarks on a program of rapid modernization
1866: England, United States - Successful transatlantic telegraph cable follows an earlier attempt in 1858 by Cyrus West Field, the first cable used for telegraph communications laid across the floor of the Atlantic Ocean crosees from the Telegraph Field, Foilhommerum Bay, Valentia Island, in western Ireland to Hearts Content in eastern Newfoundland, messages that took at least ten days to deliver by ship now took only minutes
1866: Germany, Austria - Austro-Prussian War results in the dissolution of the German Confederation and the creation of the North German Confederation and the Austrian-Hungarian Dual Monarchy
1867: Canada - Canadian Confederation formed
1867: Serbia, Turkey - The Principality of Serbia passes a Constitution which defines Its Independence from the Ottoman Empire, International recognition followed in 1878
1867: United States, Russia - The United States purchased Alaska from Russia
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