battle, landmark, First World War
First Battle of the Marne
First Battle of the Marne was a battle fought on 8 September 1914 at Aulnois, in what is now France; it lasted 4 days. It was part of the Western Front, which ran from 1914 to 1918. The recorded result: Entente victory; Failure of Schlieffen Plan. Recorded strength: 1,080,000 personnel against 750,000–900,000 personnel.
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Where it sits in the Western Front
Record
| Date | 8 September 1914 to 12 September 1914 | |
|---|---|---|
| Place | Aulnois, France 49.017N, 3.383E | |
| Kind | Battle, First World War | |
| Territorial change | German advance to Paris repulsed | |
| Strength | 1,080,000 personnel | 750,000–900,000 personnel |
| Casualties and losses | 250,000 killed or wounded; 12,733 killed or wounded | 298,000 casualties; 260,000 killed or wounded; 38,000 captured;... see #Casualties |
| Commanders |
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The ground today


The recorded site stands at about 59 m; within 10.0 km the ground runs from 0 to 244 m, 244 m of relief, hilly country and today it is 40% tree cover, 36% cropland, 13% grassland.
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
- Battle of Château-Thierry 1814, 2.9 km NE
- Battle of Château-Thierry 1918, 2.9 km N
- Battle of Belleau Wood 1918, 9.2 km NW
- Battle of Montmirail 1814, 15 km SE
- Second Battle of the Marne 1918, 22 km E
Contested ground: this site was fought over 3 times between 1814 and 1918.
In the same war
- Before: Battle of the Frontiers 6 September 1914
- After: Battle of Flirey 19 September 1914
- All 121 engagements of Western Front
Elsewhere in 1914
- Battle of Tannenberg Poland
- Battle of the Falkland Islands Argentina
- Battle of Sarikamish Turkey
- Battle of Galicia Ukraine
- First Battle of the Masurian Lakes Russia
Combat data (CDB90)
| Attacker: GER 5TH ARMY | Defender: FR 3RD ARMY | |
| Strength | 142,000 | 180,000 |
| Casualties | 29,000 (20.4%) | 29,000 (16.1%) |
| Mission accomplishment, 1 to 10 | 5 | 7 |
| Outcome | defender won | |
| Duration | 2 days | |
| Front width | 64 km | 64 km |
| Attacker advanced | 0 km | |
From the US Army Concepts Analysis Agency Database of Battles (CDB90, battle 276), public domain, in the CC0 tidy edition by Jeffrey B. Arnold. Figures are the database's estimates, compiled in 1990 from published histories, and may differ from the Wikipedia infobox above.
First Battle of the Marne is one of 2,997 engagements of the 20th century in the atlas and one of 1,383 in present-day France.
Sources
Identity, coordinates, dates and the war from Wikidata Q190712, released under CC0. Result, belligerents, commanders, strength and casualties from the infobox of the English Wikipedia article First Battle of the Marne, revision 1376519361, 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.