A History of War in 100 Battles. Richard Overy

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      The Polish-Lithuanian king John III Sobieski (1629–96) arrived at Vienna in September 1683 in time to defeat the besieging Ottoman armies. This print comes from The Gallery of Portraits with Memoirs by Arthur Malkin, published in London in 1833.

      The League was made up of 47,000 Germans and Austrians and an army of 37,000 Poles and Lithuanians. King John III Sobieski was the key figure holding the force together. He was a remarkable commander, with a string of earlier victories against Tatars and Ottomans to his credit. He had been responsible for reforming the Polish army to create a modern force. He understood Ottoman military doctrine, having been an envoy in Istanbul, and he could speak all the major Western languages (plus Tatar and Turkish), a big advantage in a multi-national force. On 6 September, his army crossed the Danube and met up with Imperial forces under Charles of Lorraine, but two days later Ottoman miners succeeded in breaching the defensive walls. The Ottoman army was poised to enter the city.

      The 85,000 Holy League troops moved into position on the Kahlenberg hills above Vienna and on 12 September they prepared for battle. There has always been some confusion over the exact size of the Ottoman force. The hard core of 20,000 warrior janissaries were supported by as many as 100,000 allied and vassal soldiers, but many were poorly armed or clothed, while the 40,000 Tatars were unreliable. The battle started at 4 a.m. with a spoiling attack by Ottoman forces, which was repulsed by the Austrians and Germans. During the morning, Kara Mustafa Pasha was determined to complete the capture of Vienna. He divided his forces between the city and the threat to the Ottoman rear, a crucial miscalculation. For twelve exhausting hours, the German–Polish infantry launched attacks against the two Ottoman flanks, while at the city walls Ottoman engineers prepared a final explosion to breach the fortifications. Ottoman troops were kept back in readiness to occupy Vienna, but an Austrian miner detected the Turkish explosive and defused it.

      Ottoman strategy exposed the army to profound danger. At 5 p.m., John Sobieski gathered the combined cavalry of the relief force together on the hills above the battle. Judging the moment to be right after hours of infantry attrition, he launched the largest cavalry charge in history. Some 20,000 horsemen, including 3,000 of Sobieski’s famed ‘winged hussars’, swept down from the hills. The Ottoman forces, exhausted after fighting all day on the plain and on the walls of Vienna, collapsed in a matter of minutes in the face of this cavalry onslaught. By 5.30 p.m., Sobieski was standing in Kara Mustafa’s magnificent tent. The Turkish armies broke and fled, leaving 15,000 dead and wounded, 5,000 prisoners and the loss of all the Turkish artillery and great quantities of treasure. The Holy League had casualties estimated at 4,500. The victory ended any prospect of an Ottoman central Europe.

      John Sobieski famously remarked ‘We came, we saw, God conquered’. Pope Innocent XI declared the feast of the Holy Name of Mary to be celebrated on 12 September throughout Catholic Christendom in commemoration. The Ottoman forces failed to return, and over the next decades Turkish rule was driven back in Hungary and Transylvania. The Habsburg–Ottoman war was finally ended with the Treaty of Karlowitz in 1699. On 25 December 1683 in Belgrade, Kara Mustafa Pasha was ritually strangled with a silk rope. John III Sobieski died in 1696, Poland’s most famous king and military commander.

      The Battle of Valmy is commonly regarded as the battle that saved the French Revolution. Three years after the overthrow of France’s absolute monarchy in summer 1789, large Austrian and Prussian armies were advancing on Paris to overthrow the revolutionary regime and restore the old social order. The Prussians were met by an army of French levies raised, they were told, to save the new nation and the liberty of its people. In truth the battle was little more than a modest exchange of fire, but the Prussians withdrew and Paris was saved. The revolution entered its more radical phase, and four months later the French king, Louis XVI, was executed.

      The horror stories spread abroad by émigré Frenchmen of the violence and depravity of the revolutionary leaders and the mobs they led fuelled the ambition of the crowned heads of Europe to try to extinguish the new system before its seditious infection touched them, too. An army of around 30,000 was gathered together by the Prussian King, Frederick William II, under the command of the Duke of Brunswick, widely regarded as one of the finest commanders in Europe. Alongside some 32,000 Austrians to the north and the south, the Prussian army moved forwards through Luxembourg and eastern France in August and early September, capturing one city after another to reach and cross the River Meuse. In Paris, the fright of invasion sped up the search for counter-revolutionary suspects and the subsequent September Massacres accounted for more than 1,000 grisly deaths, among them priests, aristocrats and a much larger number of common prisoners who were an easy target, but largely guiltless.

      The main French force, commanded by General Charles-François Dumouriez, arrived to the west of the river to occupy a ridge of hills and strong points. Dumouriez told the minister of war that he would defend to the death, like the Spartans at Thermopylae, but the first strongpoints soon fell to determined Prussian and Austrian attack. Dumouriez retreated south, where he was joined by 10,600 men under General Pierre de Beurnonville and 16,000 troops brought from Metz by General François-Christophe Kellermann. Brunswick was confident that his well-trained Prussians would sweep aside what he regarded as a revolutionary rabble, but his 30,000 soldiers were now faced by as many as 36,000 French, with 28,000 in reserve some distance away, a half-and-half mixture of veterans from the armed forces of the king and new National Guard levies raised to defend the revolution. Although discipline was lax, and the reliability of former royal officers unpredictable, it was commitment to the new national cause, rather than military spit-and-polish, that shaped the force, just as it had encouraged Washington’s irregulars in America a decade before.

      The Prussian king, travelling with Brunswick, insisted that the French would continue to retreat and encouraged him to move forward to cut off their line of escape and destroy them. On the night of 19 September, the Prussians prepared to march. At 6 a.m., the advance guard moved forward through thick rain and fog until, to their consternation, they were shelled by Kellermann’s invisible artillery, drawn up on the slopes of Mont Yron, around which Dumouriez had placed his guns and long lines of infantry, a total front-line force of 36,000 men. The artillery was manned by the old regular army and was regarded as among the most proficient in Europe. The Prussians continued to move forward, more hesitantly now until they had captured the first French guns at the inn of La Lune, where the king and his staff could also shelter. Brunswick then drew up his army in battle array opposite the hills and the village of Valmy, the artillery lined up in front of the 34,000 soldiers he had brought this far. What he lacked was a clear operational plan.

      Only when the fog lifted at noon could the Prussians see, not a revolutionary mob, but line upon line of uniformed and disciplined soldiers, well-established at the summit of an awkward slope. He ordered his infantry to form columns and advance against the French line. It was at this moment that Kellermann rose to his role as commander of the revolutionary troops. He stood up in the saddle, placed his hat with its red-white-and-blue cockade on the end of his sword, and, raising it on high, called out ‘Vive la Nation!’ It was the first battle-cry of a new age of national wars. His troops echoed back with cries of ‘Vive la Nation!’ and ‘Vive la France!’ and prepared to fight the Prussians singing the new revolutionary anthem, La Marseillaise. This was war for a modern cause, not to satisfy dynastic ambition.