OCR Specification focus:
‘Nature of and reasons for military successes and failures after 1799: Marengo and the War of the Third Coalition, including the battles of Ulm and Austerlitz, Trafalgar’
Introduction:
Napoleon’s military record after 1799 reveals both dazzling triumphs and costly failures. His campaigns demonstrate the importance of leadership, strategy, logistics, and contrasting strengths on land and sea.
The Nature of Napoleonic Warfare after 1799
Napoleonic warfare after 1799 displayed certain defining characteristics:
Concentration of force: Napoleon sought to mass his armies at decisive points to overwhelm opponents.
Rapid manoeuvre: The corps system allowed independent movement and swift concentration.
Offensive strategy: Napoleon favoured taking the initiative, striking before coalitions could fully unite.
Psychological impact: His reputation as a commander created fear and hesitancy among adversaries.
These features shaped both successes and failures in the early 1800s.
The Battle of Marengo (1800)
Context
The Battle of Marengo, fought on 14 June 1800, was Napoleon’s first major test after becoming First Consul. His aim was to drive Austrian forces out of northern Italy and consolidate French dominance.
Course of the Battle
Initially, the French were caught off guard and pushed back by Austrian attacks.
Napoleon, however, stabilised the situation with reinforcements under General Desaix.
A counterattack late in the day turned impending defeat into victory.
Significance
Cemented Napoleon’s political authority in France.
Demonstrated his ability to inspire troops and recover from near disaster.
Reinforced the principle of flexibility and opportunism in command.
The War of the Third Coalition (1805)
The Third Coalition of Britain, Austria, Russia, and others in 1805 sought to contain France. Napoleon’s response showcased his operational brilliance but also revealed limits in naval warfare.
The Ulm Campaign
Napoleon’s manoeuvre sur les derrières (manoeuvre on the enemy’s rear) brought decisive success.
At Ulm (October 1805) Napoleon’s manoeuvre sur les derrières encircled Mack on the Danube, compelling surrender without a set-piece battle.

Map of the Ulm campaign (September–October 1805) showing French operational envelopment of Austrian forces under Mack. Arrows highlight Napoleon’s manoeuvre that secured capitulation without major battle. Source
The Battle of Austerlitz
At Austerlitz (2 December 1805) Napoleon feigned weakness on the right, drew the Allies off the Pratzen Heights, then split their centre with Soult’s attack.

Situation at Austerlitz at 0900, with French deception on the right and assault on the Pratzen Heights. The map demonstrates Napoleon’s tactical brilliance in splitting the Allied line. Source
Significance of Land Successes
Operational superiority: Napoleon’s use of corps allowed independent action and concentration.
Deception and timing: His feigned weaknesses lured enemies into overextension.
Unity of command: Coalition opponents suffered from divided leadership and slow coordination.
The Naval Failure: Trafalgar (1805)
In stark contrast to land victories, France suffered a decisive naval defeat at Trafalgar (21 October 1805).
At Trafalgar (21 October 1805) Nelson’s double-column attack broke the Combined Fleet’s line and ensured long-term British command of the sea.

Diagram of fleet positions at Trafalgar around 1200 hours. Nelson’s double-column manoeuvre cut through the line of battle, securing British naval dominance and ending Napoleon’s invasion hopes. Source
Reasons for Naval Defeat
British seamanship: The Royal Navy had higher levels of training and gunnery skill.
Command quality: Nelson’s aggressive tactics contrasted with hesitant French leadership.
Logistical limits: France lacked the sustained naval infrastructure of Britain.
Broader Analysis of Successes and Failures
Reasons for French Success on Land
Innovative corps system enabling rapid, flexible deployments.
Superb generalship: Napoleon’s intuition and ability to read battlefields.
Enemy weaknesses: Slower mobilisation and coalition disunity.
Reasons for French Failure at Sea
Strategic mismatch: France was a continental power; Britain’s naval supremacy was entrenched.
Resource imbalance: Britain maintained consistent naval investment and blockade capability.
Geography: Britain’s insular position made invasion difficult.
Long-Term Implications
Land dominance: Napoleon’s reputation as a military genius was reinforced after Austerlitz.
Maritime limitations: The failure at Trafalgar ensured Britain’s freedom to finance further coalitions.
Balance of power: Successes and failures together highlight the dual nature of Napoleonic warfare — supremacy on land but vulnerability at sea.
FAQ
Geography strongly shaped outcomes. The Danube corridor gave Napoleon space for rapid marches that encircled Austrian forces at Ulm. At Austerlitz, the Pratzen Heights were the pivotal feature; ceding them initially allowed him to lure the Allies into overextension before launching a decisive counterattack. Mastery of terrain amplified French manoeuvrability and deception.
Napoleon relied on cavalry screens and spies to mask his own troop movements while gathering information on enemy deployments.
He exploited Austrian slowness and poor communication.
French intelligence allowed precise timing of the encirclement at Ulm.
Misleading enemy scouts reinforced his deceptions, particularly before Austerlitz.
The Coalition’s multinational forces faced structural difficulties:
Differing command languages and traditions.
Long communication chains slowed decision-making.
Rivalries between Austrian, Russian, and British leaders limited unity of purpose.
This contrasted with Napoleon’s centralised command, enabling rapid, decisive action.
French forces lived largely off requisitions, easing mobility but straining local populations. Long supply lines stretched from the Rhine into central Europe, making rapid campaigning vital. By striking swiftly, Napoleon avoided prolonged dependence on fragile logistics, which could otherwise undermine operations.
The Royal Navy enjoyed superior gunnery drills, firing faster and more accurately than their French or Spanish counterparts. British ships also benefited from copper-sheathed hulls, enhancing speed and endurance at sea.
French and Spanish crews were less experienced due to years of blockade.
These disparities meant Nelson’s bold tactics could be executed with confidence, ensuring devastating results when the battle line was broken.
Practice Questions
Question 1 (2 marks)
Identify two reasons why Napoleon was successful at the Battle of Austerlitz in 1805.
Question 1 (2 marks)
Award 1 mark for each valid reason identified, up to 2 marks.
Possible answers include:
Use of deception by feigning weakness on his right flank. (1 mark)
Concentration of force through Soult’s attack on the Pratzen Heights. (1 mark)
Effective use of the corps system to manoeuvre troops. (1 mark)
Exploiting disunity and poor coordination among Coalition commanders. (1 mark)
Question 2 (6 marks)
Explain why Napoleon was successful on land but failed at sea during the War of the Third Coalition in 1805.
Question 2 (6 marks)
Award up to 6 marks based on depth and balance of explanation.
Indicative content:
On land: success due to corps system (flexibility, rapid manoeuvre), Napoleon’s generalship and timing, enemy disunity (up to 3 marks if explained).
At sea: failure due to British naval superiority, Nelson’s tactics at Trafalgar, French logistical and training weaknesses (up to 3 marks if explained).
Level 1 (1–2 marks): Basic statements, little explanation, may be one-sided.
Level 2 (3–4 marks): Some explanation of both land success and sea failure but uneven detail.
Level 3 (5–6 marks): Balanced, well-explained answer showing clear understanding of contrasting reasons.