Greek War of Independence
Helped by the Great Powers, Greeks win freedom from the Ottomans

The revolt broke out in the Peloponnese in March 1821; after the Chios massacre and Byron's death at Missolonghi the war was decided at Navarino in 1827, where British, French and Russian fleets destroyed the Ottoman-Egyptian navy. The London Protocol of 1830 made Greece an independent state.
Wikipedia (Russian) · Wikipedia (English) · 19th century
Meanwhile around the world (±25 years)
Eastern Europe & Russia
- 1807 Treaties of Tilsit — 14 years earlier
- 1812 Napoleon's invasion of Russia — 9 years earlier
- 1812 Battle of Borodino — 9 years earlier
Middle East
- 1828 Treaty of Turkmenchay — 7 years later
- 1839 The Edict of Gülhane opens the Tanzimat — 18 years later
- 1839–1842 First Anglo-Afghan War — 18 years later
Africa
- 1798 Battle of the Pyramids — 23 years earlier
- 1804–1903 Usman dan Fodio's jihad and the Sokoto Caliphate — 17 years earlier
- 1805–1848 Muhammad Ali becomes ruler of Egypt — 16 years earlier
- 1830 France invades Algiers — 9 years later
- c. 1835–1846 The Great Trek — 14 years later
Asia
- 1815 Eruption of Mount Tambora — 6 years earlier
- 1817–1824 First cholera pandemic — 4 years earlier
- 1819 Raffles founds modern Singapore — 2 years earlier
- c. 1831 Hokusai's Great Wave off Kanagawa — 10 years later
- 1839–1842 First Opium War — 18 years later
Americas
- 1803 Louisiana Purchase — 18 years earlier
- 1821 Mexican independence — same year
- 1822 Independence of Brazil — 1 year later
- 1823 Monroe Doctrine — 2 years later
- 1824 Battle of Ayacucho — 3 years later
Alive at the time
- Johann Wolfgang von Goethe (aged 72)
- Napoleon Bonaparte (aged 52)
- Ludwig van Beethoven (aged 51)
- Simón Bolívar (aged 38)
- Alexander Pushkin (aged 22)
- Charles Darwin (aged 12)
- Abraham Lincoln (aged 12)
- Karl Marx (aged 3)
- Queen Victoria (aged 2)
- Fyodor Dostoevsky (aged 0)