Marengo Order of Battle

French Army

First Consul Napoleon Bonaparte
Commander-in-Chief: General of Division Louis-Alexandre Berthier (acted as Chief of Staff and Reserve Commander)
Chief of Staff: General of Division Pierre Dupont de l'Étang
Chief Engineer: General of Division Armand Samuel de Marescot
Chief of Artillery: General of Brigade Auguste de Marmont

Corps Lannes

General of Division Jean Lannes

Division: General of Division François Watrin (6648)

6th Light Demi-Brigade (1408) - Macon

22nd Line Demi-Brigade (1527) - Schreiber

40th Line Demi-Brigade (2136) - Legendre

Advance Guard: General of Brigade Joseph Mainoni

28th Line Demi-Brigade (1577) - Jean-Marie Valhubert

Attached units:

5th Dragoons (142) - Domanger

6 guns

Corps Victor

General of Division Claude Perrin Victor

Division: General of Division Gaspard Amédée Gardanne (3178)

44th Line Demi-Brigade (2248) - Daundeur

101st Line Demi-Brigade (930) - Cardenau

2 guns

Division: General of Division Jacques-Antoine de Chambarlhac de Laubespin (6564)

24th Light Demi-Brigade (2171) - Claude François Ferey

43rd Line Demi-Brigade (2326) - Baptiste Pierre Bisson

96th Line Demi-Brigade (2067) - Lepreux

5 guns

Attached units:

3rd Cavalry (262) - Romagni

Corps Desaix

General of Division Louis Charles Antoine Desaix de Veygoux

Division: General of Division Jean-Charles Monnier (3983)

19th Light Demi-Brigade (673) - Bourgeois

70th Line Demi-Brigade (1410) - Marie François Rouyer

72nd Line Demi-Brigade (1900) - Mercier

4 guns

Division: General of Division Jean Boudet (4856)

9th Light Demi-Brigade (1833) - Mathieu Delabassée

30th Line Demi-Brigade (1200) - Lajeunesse

59th Line Demi-Brigade (1823) - Bourdois

8 guns

1st Hussars (120) - Juniac

1st Cavalry (123)

Cavalry Reserve

General of Division Joachim Murat

Brigade: General of Brigade Bernard Duvignau (1227)

6th Dragoons (393) - Levreault

8th Dragoons (443) - Jacques Louis François Milet

12th Horse Chasseurs (391)

Brigade: General of Brigade François Etienne de Kellermann (449)

2nd Cavalry (258) - Ywendorff

20th Cavalry (191) - Gerard

Brigade: General of Brigade Pierre Champeaux (399)

9th Dragoons (150)

15th Horse Chasseurs (249) - Tainturier

Brigade: General of Brigade Jean Rivaud (700)

12th Hussars (340) - François Fournier-Sarlovèze

21st Horse Chasseurs (360) - Dupré

Reserve

General of Division Louis-Alexandre Berthier (acted as Chief of Staff)

Engineers (269)

Reserve Artillery

5 guns

Consular Guard Infantry: Soulès (800)

Foot Grenadiers

Foot Chasseurs

Consular Guard Cavalry: Colonel Jean-Baptiste Bessières (360)

Horse Grenadiers

Horse Chasseurs

Consular Guard Artillery: 3 guns

Austrian Army

General der Kavallerie Michael von Melas

Attached to Army

Advance Guard: Oberst Johann Maria Philipp Frimont (832)

Mariassy Jägers (164)

Bach Light Battalion Nr. 4 (277)

Am Ende Light Battalion Nr. 3 (291)

Pioneers (100)

Kaiser Dragoons Nr. 1 (272 in two squadrons)

Bussy Horse Jägers (186 in two squadrons)

Cavalry battery

Attached Artillery:

92 artillery pieces

Right Wing

Feldmarschall-Leutnant Andreas O'Reilly von Ballinlough (2997)

Brigade: General-major Franz Rousseau

Banater Grenz Infantry Regiment Nr. 4 (533)

Warasdiner-Kreutzer Grenz Infantry Regiment Nr. 5 (755)

Oguliner Grenz Infantry Regiment Nr. 3 (602)

Ottocaner Grenz Infantry Regiment Nr. 2 (298)

Mariassy Jägers (40)

Nauendorf Hussar Regiment Nr. 8 (426 in three squadrons)

Hussar Regiment Nr. 5 (230 in 2 squadrons)

Württemberg Dragoon Regiment Nr. 8 (113 in one squadron)

Cavalry battery

Center

Center: Melas

Division: Feldmarschall-Leutnant Karl Joseph Hadik von Futak (5039)

Brigade: General-major Giovanni Pilati

Karaczay Dragoon Regiment Nr. 4 (1053 in six squadrons)

Kaiser Dragoon Regiment Nr. 1 (309 in three squadrons)

Brigade: General-major Friedrich Joseph Anton von Bellegarde

Johann Jellacic Infantry Regiment Nr. 53 (613 in one battalion)

Archduke Anton Infantry Regiment Nr. 52 (855 in two battalions)

Brigade: General-major Franz Xaver Saint-Julien

Michael Wallis Infantry Regiment Nr. 11 (2209 in three battalions)

Division: Feldmarschall-Leutnant Konrad Valentin von Kaim (4939)

Brigade: General-major Auguste de Briey

Franz Kinsky Infantry Regiment Nr. 47 (1640 in two battalions)

Brigade: General-Major Vincent Knesevich

Tuscany Infantry Regiment Nr. 23 (2188 in three battalions)

Brigade: General-major Ludwig Wolff de la Marselle

Archduke Josef Infantry Regiment Nr. 63 (1111 in three battalions)

Division: Feldmarschall-Leutnant Ferdinand Johann von Morzin (4756)

Attached units: Pioneers (400)

Brigade: General-major Christoph von Latterman (2116)

Brigade: General-major Karl Philippi von Weidenfeld (2240)

It is not known which battalions belonged to which brigade.

Paar Grenadier battalion

Pers Grenadier battalion

Sciaffinati Grenadier battalion

Weber Grenadier battalion

Czerwenka Grenadier battalion

Pertusy Grenadier battalion

Piret Grenadier battalion

Khevenhüller Grenadier battalion

Gorschen Grenadier battalion

Weissenwolf Grenadier battalion

Saint-Julien Grenadier battalion

Division: Feldmarschall-Leutnant Anton von Elsnitz (4214)

Brigade: General-major Johann Nobili

Archduke Johann Dragoon Regiment Nr. 3 (859 in six squadrons)

Liechtenstein Dragoon Regiment Nr. 9 (1014 in six squadrons)

Brigade: General-major Josef Nimptsch (detached to south, not engaged)

Hussar Regiment Nr. 7 (1353 in eight squadrons)

Erdödy Hussar Regiment Nr. 9 (988 in six squadrons)

Left Wing

Feldmarschall-Leutnant Peter Karl Ott von Bátorkéz (7602)

Advance Guard: General-major Friedrich Heinrich von Gottesheim (811)

Frölich Infantry Regiment Nr. 28 (523 in one battalion)

Mariassy Jägers (40)

Lobkowitz Dragoon Regiment Nr. 10 (248 in two squadrons)

Division: Feldmarschall-Leutnant Ludwig von Vogelsang (2194)

Brigade: General-major Josef Ulm

Stuart Infantry Regiment Nr. 18 (1282 in three battalions)

Hohenlohe Infantry Regiment Nr. 17 (912 in two battalions)

Division: Feldmarschall-Leutnant Joseph von Schellenberg (4597)

Brigade: General-major Anton Retz

Frölich Infantry Regiment Nr. 28 (1046 in two battalions)

Joseph Mittrowsky Infantry Regiment Nr. 40 (835 in three battalions)

Pioneers (100)

Brigade: General-major Franz Sticker

Splenyi Infantry Regiment Nr. 51 (737 in two battalions)

Josef Colloredo Infantry Regiment Nr. 57 (1369 in three battalions)

Lobkowitz Dragoon Regiment Nr. 10 (492 in four squadrons)