På denne dag: 20. august
Utforsk avgjørende hendelser, vitenskapelige sprang og historiske vendepunkter. Med kildekritisk merking for antikke og kalenderusatte datoer.
917: Historisk hendelse
Byzantine–Bulgarian wars: Bulgarian forces led by Tsar Simeon I drove the Byzantines out of Thrace with a decisive victory at the Battle of Achelous.
1707: Historisk hendelse
The first Siege of Pensacola came to an end with the British and Creek abandoning their attempt to capture Pensacola in Spanish Florida.
1710: Historisk hendelse
War of the Spanish Succession: A Spanish Bourbon army commanded by the Marquis de Bay was soundly defeated by a multinational army led by the Austrian commander Guido Starhemberg.
1892: Historisk hendelse
Celtic Park, the largest football stadium in Scotland and home of Celtic F.C., opened.
1909: Historisk hendelse
Pluto (pictured) was photographed for the first time at the Yerkes Observatory in Williams Bay, Wisconsin, U.S., 21 years before it was officially discovered by Clyde Tombaugh.
1910: Historisk hendelse
Hurricane-force winds combined hundreds of small fires in the U.S. states of Washington and Idaho into the Devil's Broom fire, which burned about 4,700 square miles (12,100 km²), the largest fire in recorded U.S. history.
1920: Historisk hendelse
The American Professional Football Conference, a predecessor of the National Football League, was established in Canton, Ohio.
1950: Historisk hendelse
Korean War: United Nations forces repelled an attempt by North Korea to capture the city of Taegu.
1988: Historisk hendelse
The Troubles: The Provisional Irish Republican Army bombed a bus carrying British Army soldiers in Northern Ireland, killing eight of them and wounding twenty-eight.
1988: Historisk hendelse
More than 150,000 acres (610 km2) were burned on the worst day of the largest wildfire in the recorded history of Yellowstone National Park in the United States.
1989: Historisk hendelse
After colliding with the dredger Bowbelle on the River Thames in London, the pleasure boat Marchioness sank in thirty seconds, killing 51 people.
1989: Historisk hendelse
The final stage of the O-Bahn Busway in Adelaide, South Australia, was finished, completing at the time the world's longest and fastest guided busway, with buses (example pictured) travelling 12 km (7.5 mi) at speeds of up to 100 km/h (62 mph).
1998: Historisk hendelse
The Al-Shifa pharmaceutical factory (pictured) in Sudan was destroyed by a missile attack launched by the United States in retaliation for the August 7 U.S. embassy bombings.
2008: Historisk hendelse
Spanair Flight 5022 crashed just after take-off from Madrid's Barajas Airport, killing 154 people.
2018: Historisk hendelse
Silent Sam, a Confederate monument on the campus of the University of North Carolina at Chapel Hill, was toppled by protestors.
🔍 Om kildene og historisk datering
Å tidfeste hendelser tusenvis av år tilbake i tid er en krevende historievitenskapelig oppgave. Før innføringen av den julianske kalenderen (45 f.Kr.) og den gregorianske kalenderen (1582) benyttet ulike sivilisasjoner (romere, grekere, kinesere, babylonere) vidt forskjellige kalendersystemer basert på månesykluser eller lokale embetsperioder.
Slik merker vi dateringene:
• ✓ Sikker datering: Dokumentert i samtidige protokoller, offisielle traktater eller etter standardiserte kalendersystemer.
• ⚠️ Usikker / estimert: Hendelsen er historisk reell, men datoen er tradisjonell, basert på senere krøniker eller lunisolare omregninger.
- Wikimedia Foundation – Wikipedia On This Day arkiver og historiske registre.
- Store norske leksikon (SNL) – Norsk og internasjonal historie, biografier og årstallsverifisering.
- Encyclopædia Britannica – Verifisering av antikke slag, fredsavtaler og statsdannelser.
- NASA Historical Logs & Science Missions – Romfartshistoriske datoer og oppskytningstelemetri.