Atlas of Battles

battle, major, ancient

Battle of Lake Regillus

Battle of Lake Regillus was a battle fought in the 497 BCs at Regillus, in what is now Italy. It was part of First Latin War, which ran from 498 BC to 493 BC. The recorded result: Roman victory; End of Tarquinian attempts to retake the Roman throne. Recorded strength: Total: 24,700; 23,700 infantry; 1,000 cavalry against Total: 43,000; 40,000 infantry; 3,000 cavalry.

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Showing Castor and Pollux fighting at the Battle of Lake Regillus. Woodcut from Engraving by John Reinhard Weguelin (1849 to 1927). Drawing is signed "JRW1880" in bottom right corner
Showing Castor and Pollux fighting at the Battle of Lake Regillus. Woodcut from Engraving by John Reinhard Weguelin (1849 to 1927). Drawing is signed "JRW1880" in bottom right corner. John Reinhard Weguelin, Public domain, via Wikimedia Commons.
Foughtthe 497 BCs
WhereRegillus, Italy41.882N, 12.697E
OutcomeRoman victory; End of Tarquinian attempts to retake the Roman throne
BelligerentsRoman RepublicagainstLatin League
Part ofFirst Latin War498 BC to 493 BC

Record

Datethe 497 BCs (decade precision)
PlaceRegillus, Italy
41.882N, 12.697E
KindBattle, ancient
StrengthTotal: 24,700; 23,700 infantry; 1,000 cavalryTotal: 43,000; 40,000 infantry; 3,000 cavalry
Commanders
  • Aulus Postumius Albus Regillensis
  • Titus Aebutius Helva
  • Octavius Mamilius
  • Tarquinius Superbus
Battle of Lake RegillusBattle of Lake RegillusBattle of Monte PorzioBattle of MarinoSack of RomeSiege of RomeBattle of the Colline GateBattle of MarinoSack of RomeNaplesPescaraL'AquilaBeneventoCivitavecchiaCampobasso100 km41.882N, 12.697E
The recorded site, with the nearest other engagements in the atlas. Present-day coastlines, rivers and borders; towns from Natural Earth.

The ground today

Relief of the ground around the site of Battle of Lake Regillus
Relief within about 10.0 km of the site, contours every 25 m. Copernicus DEM GLO-30, ESA.
Satellite view of the site of Battle of Lake Regillus today
The same ground from Sentinel-2 on 2023-10-02. Contains modified Copernicus Sentinel data 2023.

The recorded site stands at about 53 m; within 10.0 km the ground runs from 21 to 324 m, 303 m of relief, hilly country and today it is 32% cropland, 30% built-up, 20% tree cover.

cropland: 32%built-up: 30%tree cover: 20%grassland: 12%shrubland: 5%cropland 32%built-up 30%tree cover 20%grassland 12%shrubland 5%
west to east, 10.0 km49 to 137 mnorth to south, 10.0 km35 to 192 m
Elevation from the Copernicus DEM GLO-30 (ESA, Airbus); land cover from ESA WorldCover 2021 (CC BY 4.0), within about 5 km of the recorded site. Computed, not recorded.

Nearest engagements

Elsewhere in 497 BC

Battle of Lake Regillus is one of 99 engagements of the 5th century BC in the atlas and one of 942 in present-day Italy.

Sources

Identity, coordinates, dates and the war from Wikidata Q1644792, released under CC0. Result, belligerents, commanders, strength and casualties from the infobox of the English Wikipedia article Battle of Lake Regillus, revision 1378105313, read 2026-11-14, licensed CC BY-SA 4.0; the article's text is not reproduced here. Present-day country and state from Natural Earth. Dates before 1582 follow the Julian calendar as recorded.