| 1231-1808: |  |  |  | Papal Inquisition from before birth until age 13 |
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| 1478-1834: | |
| 1760-1820: |  |  |  | Reign of King George III (Hanover) from before birth until age 25 |
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| 1789-1796: |  |  |  | George Washington selected 1st President from before birth until age 1 |
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| 1792-1815: |  |  |  | Napoleonic war from before birth until age 20 |
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| 1796: |  |  |  | Tennesee enters the union - 16th at age 1 |
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| 1796: |  |  |  | Vaccination against Smallpox at age 1 |
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| 1796: |  |  |  | France's presses get right of free speech at age 1 |
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| 1796-1800: |  |  |  | John Adams elected 2nd president of US from age 1 to age 5 |
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| 1798: | |
| 1798: |  |  |  | Mississippi organized as a territory at age 3 |
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| 1798-1800: |  |  |  | Undeclared war with France from age 3 to age 5 |
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| 1798: |  |  |  | US Marine Corps Established at age 3 |
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| 1799: |  |  |  | Rosetta Stone found at age 4 |
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| 1800: |  |  |  | US capital moves from Philadelphia to Washington DC at age 5 |
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| 1800-1809: |  |  |  | Thomas Jefferson elected president of US from age 5 to age 14 |
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| 1800: |  |  |  | Russia annexes Georgia at age 5 |
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| 1800: |  |  |  | 1st Battery (Volta) at age 5 |
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| 1802: |  |  |  | Babylonian cuniform deciphered at age 7 |
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| 1803: |  |  |  | Ohio enters the union - 17th at age 8 |
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| 1803: |  |  |  | Fulton propels vessel by steampower at age 8 |
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| 1803: |  |  |  | Louisiana Territory Purchased at age 8 |
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| 1804-1806: |  |  |  | Lewis and Clark Expedition from age 9 to age 11 |
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| 1804: |  |  |  | Haiti independent - 1st black country in West. Hemis. at age 9 |
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| 1805: |  |  |  | Morphine isolated at age 10 |
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| 1805: |  |  |  | Thomas Jefferson re-elected president of US at age 10 |
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| 1807: |  |  |  | Robert Fulton makes 1st practical steamboat voyage at age 12 |
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| 1808: |  |  |  | Import of new slaves into US Is banned at age 13 |
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| 1808: |  |  |  | Pompeii excavation begins in earnest at age 13 |
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| 1809: |  |  |  | Charles Darwin born at age 14 |
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| 1809-1816: |  |  |  | James Madison elected president of US from age 14 to age 21 |
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| 1810: |  |  |  | US pop. reaches 7.2 million at age 15 |
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| 1810: |  |  |  | Homeopathy founded at age 15 |
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| 1812: |  |  |  | Missouri organized as a territory at age 17 |
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| 1812: |  |  |  | Louisiana enters the union - 18th at age 17 |
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| 1812-1814: |  |  |  | War of 1812 from age 17 to age 19 |
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| 1815: |  |  |  | French outlaw slavery in France at age 20 |
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| 1815: |  |  |  | Sumbawa volcano (Indonesia) erupts; 50,000 killed at age 20 |
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| 1815: |  |  |  | Battle of Waterloo at age 20 |
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| 1816: |  |  |  | Photographic Negative at age 21 |
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| 1816: | |
| 1816: |  |  |  | Indiana enters the union - 19th at age 21 |
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| 1817: |  |  |  | Pentrich Revolution - England's last revolution at age 22 |
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| 1817-1824: |  |  |  | James Monroe president of US from age 22 to age 29 |
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| 1817: |  |  |  | Alabama organized as a territory at age 22 |
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| 1817-1823: |  |  |  | 1st Cholera pandemic from age 22 to age 28 |
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| 1817-1825: |  |  |  | Erie canal constructed from age 22 to age 30 |
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| 1817: |  |  |  | Mississippi enters the union - 20th at age 22 |
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| 1818: |  |  |  | Illinois enters the union - 21st at age 23 |
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| 1818: |  |  |  | Savannah 1st steamship to cross the Atlantic at age 23 |
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| 1819: |  |  |  | Oersted discovers electro-magnetism at age 24 |
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| 1819: |  |  |  | Alabama enters the union - 22nd at age 24 |
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| 1819: |  |  |  | Arkansas organized as a territory at age 24 |
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| 1820-1830: |  |  |  | Reign of King George IV (Hanover) from age 25 to age 35 |
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| 1820: |  |  |  | Maine enters the union - 23rd at age 25 |
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| 1821-1829: |  |  |  | Greek war of Independence from age 26 to age 34 |
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| 1821: |  |  |  | US pop. reaches 9.2 million at age 26 |
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| 1821: |  |  |  | 1st US women's college at age 26 |
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| 1821: |  |  |  | Missouri enters the union - 24th at age 26 |
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| 1822: |  |  |  | Florida organized as a territory at age 27 |
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| 1824: |  |  |  | Internal Combustion Engine at age 29 |
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| 1824-1828: |  |  |  | John Quincy Adams president of US from age 29 to age 33 |
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| 1824: |  |  |  | Erie canal finished at age 29 |
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| 1826: |  |  |  | 1st railroad tunnel (England) at age 31 |
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| 1827: |  |  |  | 1st Black newspaper Freedom's Journal at age 32 |
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| 1827: |  |  |  | Ohms Law formulated at age 32 |
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| 1827: |  |  |  | Ship's propeller (screw) at age 32 |
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| 1828: |  |  |  | 1st Webster's Dictionary at age 33 |
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| 1828: |  |  |  | 1st railroad in the US at age 33 |
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| 1828-1836: |  |  |  | Andrew Jackson president of US from age 33 to age 41 |
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| 1829-1851: |  |  |  | 2nd Cholera pandemic from age 34 until after line end |
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| 1829: |  |  |  | 1st US patent on a typewriter at age 34 |
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| 1830-1837: |  |  |  | Reign of King William IV (Hanover) from age 35 to age 42 |
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| 1830-1860: |  |  |  | Underground railroad leads 100,000+ slaves to freedom in US from age 35 until after line end |
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| 1830: |  |  |  | Mormons (Latter Day Saints) founded at age 35 |
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| 1832: |  |  |  | Horse-drawn trolleys in New York at age 37 |
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| 1833: | |
| 1833: |  |  |  | Slavery abolished in British Empire (home and colonies) at age 38 |
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| 1834: |  |  |  | Modern computer conceived by Charles Babbage at age 39 |
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| 1835: |  |  |  | Mormon leader Joseph Smith prophesies of 'coming of lord' by 1891 at age 40 |
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| 1835-1842: |  |  |  | 2nd Seminole War from age 40 to age 47 |
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| 1835: | |
| 1836: |  |  |  | Arkansas enters the union -25th at age 41 |
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| 1836: |  |  |  | Battle of the Alamo at age 41 |
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| 1836: |  |  |  | Texas war for independence from Mexico at age 41 |
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| 1837-1901: |  |  |  | Reign of Queen Victoria (Hanover) from age 42 until after line end |
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| 1837: |  |  |  | Depression and Panic in the US - inflation, speculation at age 42 |
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| 1837-1840: |  |  |  | Martin Van Buren president of US from age 42 to age 45 |
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| 1837: |  |  |  | Michigan enters the union - 26th at age 42 |
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| 1838-1839: |  |  |  | Forced relocation of Cherokee from age 43 to age 44 |
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| 1839-1842: |  |  |  | Opium war between China and the English from age 44 to age 47 |
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| 1841-1844: |  |  |  | John Tyler president of US from age 46 to age 49 |
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| 1842: |  |  |  | Chinese cede Hong Kong to the English at age 47 |
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| 1844: |  |  |  | 1st telegraph line message, Washington to New York at age 49 |
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| 1845: |  |  |  | Florida enters the union - 27th at age 50 |
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| 1845: |  |  |  | Texas enters the union - 28th at age 50 |
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| 1845-1849: |  |  |  | Irish Potato Famine from age 50 until after line end |
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| 1845-1848: |  |  |  | James K Polk president of US from age 50 to age 53 |
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| 1846-1848: |  |  |  | The Mexican-US War from age 51 to age 53 |
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| 1846: |  |  |  | Iowa enters the union - 29th at age 51 |
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| 1848: |  |  |  | Wisconsin enters the union - 30th at age 53 |
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| 1848-1856: |  |  |  | 1st gold rush in California -- Sutters Mill from age 53 until after line end |
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| 1848: |  |  |  | Oregon organized as a territory at age 53 |
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| 1848: |  |  |  | NY allows women to own real estate at age 53 |
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