| 1231-1808: |  | | | Papal Inquisition from before birth until age 9 |
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| 1478-1834: | |
| 1760-1820: | | | | Reign of King George III (Hanover) from before birth until age 21 |
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| 1792-1815: | | | | Napoleonic war from before birth until age 16 |
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| 1796-1800: | | | | John Adams elected 2nd president of US from before birth until age 1 |
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| 1798-1800: | | | | Undeclared war with France from before birth until age 1 |
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| 1799: | | | | Rosetta Stone found at age 0 |
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| 1800-1809: | | | | Thomas Jefferson elected president of US from age 1 to age 10 |
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| 1800: | | | | Russia annexes Georgia at age 1 |
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| 1800: | | | | 1st Battery (Volta) at age 1 |
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| 1800: | | | | US capital moves from Philadelphia to Washington DC at age 1 |
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| 1802: | | | | Babylonian cuniform deciphered at age 3 |
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| 1803: | | | | Louisiana Territory Purchased at age 4 |
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| 1803: | | | | Fulton propels vessel by steampower at age 4 |
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| 1803: | | | | Ohio enters the union - 17th at age 4 |
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| 1804-1806: | | | | Lewis and Clark Expedition from age 5 to age 7 |
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| 1804: | | | | Haiti independent - 1st black country in West. Hemis. at age 5 |
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| 1805: | | | | Morphine isolated at age 6 |
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| 1805: | | | | Thomas Jefferson re-elected president of US at age 6 |
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| 1807: | | | | Robert Fulton makes 1st practical steamboat voyage at age 8 |
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| 1808: | | | | Import of new slaves into US Is banned at age 9 |
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| 1808: | | | | Pompeii excavation begins in earnest at age 9 |
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| 1809: | | | | Charles Darwin born at age 10 |
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| 1809-1816: | | | | James Madison elected president of US from age 10 to age 17 |
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| 1810: | | | | US pop. reaches 7.2 million at age 11 |
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| 1810: | | | | Homeopathy founded at age 11 |
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| 1812: | | | | Missouri organized as a territory at age 13 |
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| 1812-1814: | | | | War of 1812 from age 13 to age 15 |
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| 1812: | | | | Louisiana enters the union - 18th at age 13 |
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| 1815: | | | | Battle of Waterloo at age 16 |
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| 1815: | | | | French outlaw slavery in France at age 16 |
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| 1815: | | | | Sumbawa volcano (Indonesia) erupts; 50,000 killed at age 16 |
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| 1816: | | | | Indiana enters the union - 19th at age 17 |
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| 1816: | | | | Photographic Negative at age 17 |
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| 1816: | |
| 1817-1823: | | | | 1st Cholera pandemic from age 18 to age 24 |
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| 1817: | | | | Pentrich Revolution - England's last revolution at age 18 |
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| 1817-1825: | | | | Erie canal constructed from age 18 to age 26 |
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| 1817: | | | | Mississippi enters the union - 20th at age 18 |
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| 1817-1824: | | | | James Monroe president of US from age 18 to age 25 |
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| 1817: | | | | Alabama organized as a territory at age 18 |
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| 1818: | | | | Savannah 1st steamship to cross the Atlantic at age 19 |
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| 1818: | | | | Illinois enters the union - 21st at age 19 |
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| 1819: | | | | Alabama enters the union - 22nd at age 20 |
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| 1819: | | | | Oersted discovers electro-magnetism at age 20 |
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| 1819: | | | | Arkansas organized as a territory at age 20 |
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| 1820-1830: | | | | Reign of King George IV (Hanover) from age 21 to age 31 |
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| 1820: | | | | Maine enters the union - 23rd at age 21 |
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| 1821-1829: | | | | Greek war of Independence from age 22 to age 30 |
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| 1821: | | | | Missouri enters the union - 24th at age 22 |
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| 1821: | | | | US pop. reaches 9.2 million at age 22 |
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| 1821: | | | | 1st US women's college at age 22 |
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| 1822: | | | | Florida organized as a territory at age 23 |
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| 1824: | | | | Erie canal finished at age 25 |
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| 1824: | | | | Internal Combustion Engine at age 25 |
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| 1824-1828: | | | | John Quincy Adams president of US from age 25 to age 29 |
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| 1826: | | | | 1st railroad tunnel (England) at age 27 |
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| 1827: | | | | Ship's propeller (screw) at age 28 |
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| 1827: | | | | 1st Black newspaper Freedom's Journal at age 28 |
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| 1827: | | | | Ohms Law formulated at age 28 |
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| 1828-1836: | | | | Andrew Jackson president of US from age 29 to age 37 |
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| 1828: | | | | 1st Webster's Dictionary at age 29 |
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| 1828: | | | | 1st railroad in the US at age 29 |
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| 1829: | | | | 1st US patent on a typewriter at age 30 |
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| 1829-1851: | | | | 2nd Cholera pandemic from age 30 to age 52 |
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| 1830: | | | | Mormons (Latter Day Saints) founded at age 31 |
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| 1830-1860: | | | | Underground railroad leads 100,000+ slaves to freedom in US from age 31 until after line end |
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| 1830-1837: | | | | Reign of King William IV (Hanover) from age 31 to age 38 |
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| 1832: | | | | Horse-drawn trolleys in New York at age 33 |
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| 1833: | | | | Slavery abolished in British Empire (home and colonies) at age 34 |
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| 1833: | |
| 1834: | | | | Modern computer conceived by Charles Babbage at age 35 |
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| 1835: | |
| 1835: | | | | Mormon leader Joseph Smith prophesies of 'coming of lord' by 1891 at age 36 |
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| 1835-1842: | | | | 2nd Seminole War from age 36 to age 43 |
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| 1836: | | | | Battle of the Alamo at age 37 |
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| 1836: | | | | Texas war for independence from Mexico at age 37 |
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| 1836: | | | | Arkansas enters the union -25th at age 37 |
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| 1837: | | | | Depression and Panic in the US - inflation, speculation at age 38 |
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| 1837: | | | | Michigan enters the union - 26th at age 38 |
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| 1837-1901: | | | | Reign of Queen Victoria (Hanover) from age 38 until after line end |
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| 1837-1840: | | | | Martin Van Buren president of US from age 38 to age 41 |
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| 1838-1839: | | | | Forced relocation of Cherokee from age 39 to age 40 |
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| 1839-1842: | | | | Opium war between China and the English from age 40 to age 43 |
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| 1841-1844: | | | | John Tyler president of US from age 42 to age 45 |
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| 1842: | | | | Chinese cede Hong Kong to the English at age 43 |
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| 1844: | | | | 1st telegraph line message, Washington to New York at age 45 |
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| 1845: | | | | Florida enters the union - 27th at age 46 |
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| 1845-1849: | | | | Irish Potato Famine from age 46 to age 50 |
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| 1845: | | | | Texas enters the union - 28th at age 46 |
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| 1845-1848: | | | | James K Polk president of US from age 46 to age 49 |
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| 1846-1848: | | | | The Mexican-US War from age 47 to age 49 |
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| 1846: | | | | Iowa enters the union - 29th at age 47 |
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| 1848-1856: | | | | 1st gold rush in California -- Sutters Mill from age 49 until after line end |
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| 1848: | | | | Wisconsin enters the union - 30th at age 49 |
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| 1848: | | | | NY allows women to own real estate at age 49 |
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| 1848: | | | | Oregon organized as a territory at age 49 |
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| 1849-1852: | | | | Zachary Taylor president of the US from age 50 to age 53 |
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| 1849: | | | | Fizeau measures speed of light at age 50 |
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| 1850: | | | | California enters the union - 31st at age 51 |
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| 1850: | | | | World pop. est. at 1.1 billion at age 51 |
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| 1850: | | | | New Mexico organized as a territory at age 51 |
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| 1850: | | | | US pop reaches 23 million at age 51 |
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| 1850: | | | | Utah (included Nevada) organized as a territory at age 51 |
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| 1851: | | | | Gold rush in Australia at age 52 |
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| 1852-1859: | | | | 3rd Cholera pandemic from age 53 until after line end |
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| 1853: | | | | Washington (included pt. of Idaho) organized as a territory at age 54 |
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| 1853-1856: | | | | Franklin Pierce president of US from age 54 until after line end |
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