Question: What's the ending date of Battle of Liegnitz?

full_context: Document 1: Battle of Mohi: The Battle of Mohi (today Muhi), also known as Battle of the Sajó River or Battle of the Tisza River (11 April 1241), was the main battle between the Mongol Empire and the Kingdom of Hungary during the Mongol invasion of Europe. It took place at Muhi, southwest of the Sajó River. After the invasion, Hungary lay in ruins. Nearly half of the inhabited places had been destroyed by the invading armies. Around 15–25 percent of the population was lost, mostly in lowland areas, especially in the Great Hungarian Plain, the southern reaches of the Hungarian plain in the area now called the Banat and in southern Transylvania.
Document 2: Northern Seven Years' War: By this point Frederick was increasingly concerned by the Russian advance from the east and marched to counter it. Just east of the Oder in Brandenburg-Neumark, at the Battle of Zorndorf (now Sarbinowo, Poland), a Prussian army of 35,000 men under Frederick on Aug. 25, 1758, fought a Russian army of 43,000 commanded by Count William Fermor. Both sides suffered heavy casualties – the Prussians 12,800, the Russians 18,000 – but the Russians withdrew, and Frederick claimed victory. In the undecided Battle of Tornow on 25 September, a Swedish army repulsed six assaults by a Prussian army but did not push on Berlin following the Battle of Fehrbellin.
Document 3: Battle on the Marchfeld: The Battle on the Marchfeld ("i.e. Morava Field"; ; ) at Dürnkrut and Jedenspeigen took place on 26 August 1278 and was a decisive event for the history of Central Europe for the following centuries. The opponents were a Bohemian (Czech) army led by the Přemyslid king Ottokar II of Bohemia and the German army under the German king Rudolph I of Habsburg in alliance with King Ladislaus IV of Hungary. With 15,300 mounted troops, it was one of the largest cavalry battles in Central Europe during the Middle Ages. The Hungarian cavalry played a significant role in the outcome of the battle.
Document 4: Battle of Legnica: The Battle of Legnica (), also known as the Battle of Liegnitz () or Battle of Wahlstatt (), was a battle between the Mongol Empire and the combined defending forces of European fighters that took place at Legnickie Pole ("Wahlstatt") near the city of Legnica in the Duchy of Silesia on 9 April 1241.
Document 5: King Jagiello Monument: The King Jagiełło Monument is an equestrian monument of Władysław II Jagiełło, King of Poland and Grand Duke of Lithuania, located in Central Park, New York City. The monument commemorates the Battle of Grunwald, a decisive defeat of the Teutonic Order in 1410. Originally made for the Polish 1939 New York World's Fair pavilion, the monument was permanently installed in Central Park in 1945. Raised on its grand plinth it is one of the most prominently-sited and impressive of twenty-nine sculptures located in the park.
Document 6: Mongol invasion of Kievan Rus': In mid-1238, Batu Khan devastated the Crimea and pacified Mordovia. In the winter of 1239, he sacked Chernigov and Pereyaslav. After many days of siege, the horde stormed Kiev in December 1240. Despite the resistance of Danylo of Halych, Batu Khan managed to take two of his principal cities, Halych and Volodymyr - Volynskyi. The Mongols then resolved to ``reach the ultimate sea '', where they could proceed no further, and invaded Hungary and Poland.
Document 7: Battle of Münchengrätz: The Battle of Münchengrätz () or Battle of Mnichovo Hradiště () was fought near Mnichovo Hradiště, modern day Czech Republic, on 28 June 1866 during the Austro-Prussian War. It ended in a Prussian victory over the Austrian Empire.
Document 8: Franco-Prussian War: At the Battle of Mars-la-Tours, the Prussian 12th Cavalry Brigade, commanded by General Adalbert von Bredow, conducted a charge against a French artillery battery. The attack was a costly success and came to be known as "von Bredow's Death Ride", which was held to prove that cavalry charges could still prevail on the battlefield. Use of traditional cavalry on the battlefields of 1914 proved to be disastrous, due to accurate, long-range rifle fire, machine-guns and artillery. Von Bredow's attack had succeeded only because of an unusually effective artillery bombardment just before the charge, along with favorable terrain that masked his approach.
Document 9: Battle of Grünberg: The Battle of Grünberg (21 March 1761) was fought between French and allied Prussian and Hanoverian troops in the Seven Years' War at village of Grünberg, Hesse, near Stangenrod. The French, led by the duc de Broglie, inflicted a significant defeat on the allies, taking several thousand prisoners, and capturing 18 military standards. The allied loss prompted Duke Ferdinand of Brunswick to lift the Siege of Cassel and retreat.
Document 10: Battle of Liegnitz (1760): The armies collided around the town of Liegnitz (now Legnica, Poland) in Lower Silesia. Laudon's Austrian cavalry attacked the Prussian position in the early morning but were beaten back by General Zieten's Hussars. An artillery duel emerged which was eventually won for the Prussians when a grenade hit an Austrian powder wagon. The Austrian infantry then proceeded to attack the Prussian line, but was met with concentrated artillery fire. A Prussian infantry counter-attack led by the Regiment Anhalt-Bernburg on the left forced the Austrians into retreat. Notably, the Anhalt-Bernburgers charged Austrian cavalry with bayonets, a rare example of infantry assaulting cavalry.
Document 11: Battle of Grunwald: The Battle of Grunwald, First Battle of Tannenberg or Battle of Žalgiris was fought on 15 July 1410 during the Polish–Lithuanian–Teutonic War. The alliance of the Crown of the Kingdom of Poland and the Grand Duchy of Lithuania, led respectively by King Władysław II Jagiełło (Jogaila) and Grand Duke Vytautas, decisively defeated the German–Prussian Teutonic Knights, led by Grand Master Ulrich von Jungingen. Most of the Teutonic Knights' leadership were killed or taken prisoner. Although defeated, the Teutonic Knights withstood the siege of their fortress in Marienburg (Malbork) and suffered minimal territorial losses at the Peace of Thorn (1411) (Toruń), with other territorial disputes continuing until the Peace of Melno in 1422. The knights, however, would never recover their former power, and the financial burden of war reparations caused internal conflicts and an economic downturn in the lands under their control. The battle shifted the balance of power in Central and Eastern Europe and marked the rise of the Polish–Lithuanian union as the dominant political and military force in the region.
Document 12: Battle of Varna: The Battle of Varna took place on 10 November 1444 near Varna in eastern Bulgaria. The Ottoman Army under Sultan Murad II defeated the Hungarian–Polish and Wallachian armies commanded by Władysław III of Poland (also King of Hungary), John Hunyadi (acting as commander of the combined Christian forces) and Mircea II of Wallachia. It was the final battle of the Crusade of Varna.
Document 13: Battle of Zhongdu: The Battle of Zhongdu (present-day Beijing) was a battle in 1215 between the Mongols and the Jurchen Jin dynasty, which controlled northern China. The Mongols won and continued their conquest of China.
Document 14: Northern Seven Years' War: Despite this, the Austrians, under the command of General Laudon, captured Glatz (now Kłodzko, Poland) in Silesia. In the Battle of Liegnitz Frederick scored a strong victory despite being outnumbered three to one. The Russians under General Saltykov and Austrians under General Lacy briefly occupied his capital, Berlin, in October, but could not hold it for long. The end of that year saw Frederick once more victorious, defeating the able Daun in the Battle of Torgau; but he suffered very heavy casualties, and the Austrians retreated in good order.
Document 15: Battle of Warburg: The Battle of Warburg was a battle fought on 31 July 1760 during the Seven Years' War. The Battle was a victory for the Hanoverians and the British against the French. British general John Manners, Marquess of Granby achieved some fame for charging at the head of the British cavalry and losing his hat and wig during the charge. The French lost 1500 men, killed and wounded, around 2,000 prisoners and ten pieces of artillery.
ground_truth: 9 April 1241
sub_queries: Battle of Liegnitz >> location Answer: Legnica
On what date did Battle of Legnica end? Answer: 9 April 1241