page_title: Battle of Wagram
section_title: Preliminaries
hierarchical_section_title: Battle of Wagram / The first day / Preliminaries
caption_attribution_description: English: Napoleon Crossing the Bridge to Lobau Island 1912 Richard Caton Woodville 1856-1927
context_page_description: The Battle of Wagram was a military engagement of the Napoleonic Wars that ended in a costly but decisive victory for Emperor Napoleon Bonaparte's French and allied army against the Austrian army under the command of Archduke Charles of Austria-Teschen. The battle led to the breakup of the Fifth Coalition, the Austrian and British-led alliance against France.
  In 1809, the French military presence in Germany was diminished as Napoleon transferred a number of soldiers to fight in the Peninsular War. As a result, the Austrian Empire saw its chance to recover some of its former sphere of influence and invaded the Kingdom of Bavaria, a French ally. Recovering from his initial surprise, Napoleon beat the Austrian forces and occupied Vienna at the beginning of May 1809. Despite the string of sharp defeats and the loss of the empire's capital, Archduke Charles salvaged an army, with which he retreated north of the Danube. This allowed the Austrians to continue the war. Towards the end of May, Napoleon resumed the offensive, suffering a surprise defeat at the Battle of Aspern-Essling.
context_section_description: The battle here at Marchfeld will decide the fate of our dynasty [...] I request that you march out here at once and join my left wing.
  — Archduke Charles, writing to his younger brother, Archduke John, commander of a secondary Austrian army.
  The Austrian high command was well aware of the French preparations on Lobau island and thus understood that the French attack would come from there. Archduke Charles was however unsure about where the French would cross and, together with his staff reckoned that the crossing would most likely be made from the north of the island, making landfall roughly at the same location as at the Battle of Aspern-Essling. Working on this hypothesis, Charles had a chain of 16 defensive redoubts built, essentially between Aspern and Groß-Enzersdorf. Strangely, he did not extend the earthworks southeast, along the riverline, which meant that the line could be outflanked. Moreover, the redoubts did not provide all-round protection and an Austrian observer noted that only Turks would throw up such poor earthworks. Charles's belief that Napoleon would cross north of Lobau seemed to be confirmed on 2 July, when he received news that French forces began to cross the river there. The Austrian commander thought that the battle scenario he had prepared for – a repetition of the battle fought at the end of May – was about to materialise, so he promptly moved his entire force to face the enemy. However, it soon became obvious that the French force was only a small detachment, sent forward to secure a bridgehead.
  On 3 July, Archduke Charles finally decided not to fight the enemy near the Danube and retreated to the higher ground overlooking the Marchfeld. This was a major decision, as it meant that the earlier plan to man the 16 redoubts next to the Danube and fight the enemy there was abandoned. Instead, Archduke Charles occupied both the Bisamberg heights and the Wagram plateau behind the Russbach river, covering the retreat routes to Bohemia and Moravia respectively, thus occupying a sound strategic position. Although the army was not strong enough to occupy both positions and no earthworks were provided for the new position, it was thought that, given that the two heights were placed at an angle to one another, any enemy force attacking would find itself placed between two pincers. There was perhaps further justification for this choice on a tactical level: the broken and wooded terrain in the immediate proximity of the Danube was adapted to fighting in open order formations, which were insufficiently mastered by his men, and at which the French were adept. This was, without a doubt, one of the bitter lessons that the Austrians learned at Aspern and Essling. But above all, the cautious Archduke Charles was unwilling to take the risk of committing his forces in such an advanced position, knowing that he would have a hard time extricating them, should retreat have become necessary. He also planned not to face the enemy on the flat plains of the Marchfeld, an ideal cavalry terrain, where the numerically superior French horse would quickly gain the upper hand. The two influential staff officers, Wimpffen and Grünne, had been actively advocating for this position for weeks and this time Charles finally acquiesced to their point of view.
caption: Napoleon Crossing the Bridge to Lobau Island.
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