Peninsular War
Spain rises against Napoleon and gives us 'guerrilla'

In 1807 the French marched into Portugal, and in 1808 Napoleon put his brother Joseph on the Spanish throne; on 2 May Madrid rose, guerrilla war spread across the country and Wellington's British army landed in Portugal. For years the war tied down hundreds of thousands of French troops, ending with the French driven out in 1814.
Wikipedia (Russian) · Wikipedia (English) · 19th century
Meanwhile around the world (±25 years)
Eastern Europe & Russia
- 1783 Russian annexation of Crimea (1783) — 24 years earlier
- 1807 Treaties of Tilsit — same year
- 1812 Napoleon's invasion of Russia — 5 years later
- 1812 Battle of Borodino — 5 years later
Middle East
- 1828 Treaty of Turkmenchay — 21 years later
Africa
- 1798 Battle of the Pyramids — 9 years earlier
- 1804–1903 Usman dan Fodio's jihad and the Sokoto Caliphate — 3 years earlier
- 1805–1848 Muhammad Ali becomes ruler of Egypt — 2 years earlier
- 1830 France invades Algiers — 23 years later
Asia
- 1815 Eruption of Mount Tambora — 8 years later
- 1817–1824 First cholera pandemic — 10 years later
- 1819 Raffles founds modern Singapore — 12 years later
- c. 1831 Hokusai's Great Wave off Kanagawa — 24 years later
Americas
- 1803 Louisiana Purchase — 4 years earlier
- 1810–1826 Spanish American wars of independence — 3 years later
- 1812–1815 War of 1812 — 5 years later
- 1817 San Martín's Crossing of the Andes — 10 years later
- 1821 Mexican independence — 14 years later
Oceania
- 1788 First Fleet arrives in Australia — 19 years earlier
Alive at the time
- Johann Wolfgang von Goethe (aged 58)
- Napoleon Bonaparte (aged 38)
- Ludwig van Beethoven (aged 37)
- Simón Bolívar (aged 24)
- Alexander Pushkin (aged 8)
- James Watt (aged 71)
- George III (aged 69)
- Thomas Jefferson (aged 64)
- Mikhail Kutuzov (aged 62)
- Louis XVIII (aged 52)