Question: What major victory did the allies of Chaumont achieve to end a war?

Context paragraphs:
Battle of Andros (1790): The Battle of Andros was fought on 17–18 May 1790, during the Russo–Turkish War of 1787–1792, between Cape Kafireas and the island of Andros, between the ships of the Greek privateer in Russian service Lambros Katsonis and an Ottoman–Algerian fleet of 30–32 vessels.  The battle was a major victory for the Ottomans, as Katsonis lost five ships and his flotilla ceased to exist as an operational unit.  On the other hand, the Ottomans suffered heavy casualties as well, and Katsonis was able to escape and reconstitute his forces, remaining active until the end of the war.

Carl Gustav Fleischer: Carl Gustav Fleischer KCB (28 December 1883 – 19 December 1942) was a Norwegian general and the first land commander to win a major victory against the Germans in the Second World War.  Having followed the Norwegian government into exile at the end of the Norwegian Campaign, Fleischer committed suicide after being bypassed for appointment as commander-in-chief of the Norwegian Armed Forces in exile and being sent to the insignificant post as commander of Norwegian forces in Canada.

First Battle of Winchester: The First Battle of Winchester, fought on May 25, 1862, in and around Frederick County, Virginia, and Winchester, Virginia, was a major victory in Confederate Army Maj. Gen. Thomas J. "Stonewall" Jackson's Campaign through the Shenandoah Valley during the American Civil War.  Jackson enveloped the right flank of the Union Army under Maj. Gen. Nathaniel P. Banks and pursued it as it fled across the Potomac River into Maryland.  Jackson's success in achieving force concentration early in the fighting allowed him to secure a more decisive victory which had escaped him in previous battles of the campaign.

Treaty of Paris (1814): The Treaty of Paris, signed on 30 May 1814, ended the war between France and the Sixth Coalition, part of the Napoleonic Wars, following an armistice signed on 23 April between Charles, Count of Artois, and the allies.  It established peace between France and the United Kingdom of Great Britain and Ireland, Russia, Austria, and Prussia, who in March had defined their common war aim in Chaumont.  The Treaty was also signed by Portugal and Sweden while Spain signed shortly after in July.  Peace talks had started on 9 May between Talleyrand, who negotiated with the allies of Chaumont on behalf of the exiled Bourbon king Louis XVIII of France.  The allies had agreed to reduce France to her 1792 borders and restore the independence of her neighbors after Napoleon Bonaparte's defeat.  However, the allied parties did not sign a common document, but instead concluded separate treaties with France allowing for specific amendments.

Controversies relating to the Six-Day War: The Six-Day War was fought between June 5 and June 10, 1967, by Israel and the neighboring states of Egypt [known then as the United Arab Republic (UAR)], Jordan, and Syria.  The war began with a large-scale surprise air strike by Israel on Egypt and ended with a major victory by Israel.  A number of controversies have arisen out of the causes and conduct of the war, namely: whether Israel's action was a preemptive strike justified by the threat of an imminent attack by the Arab states or an unjustified and unprovoked attack; whether the Egyptians killed stragglers from their own forces as they returned from the defeat; whether the Israelis killed unarmed Egyptian prisoners; and the extent of foreign support given to the combatants in the war.

Siege of Lille (1667): The Siege of Lille took place during the War of Devolution.  Louis XIV's forces besieged Lille from August 10 to September 26, 1667.  It was the only major engagement of the war.  Lille was the first major victory for Vauban’s siege techniques.  Louis XIV, arguing that the Spanish dowry of his wife Maria Theresa of Spain had not been paid, began to expand French borders to the north and east, invading the Spanish Netherlands.  This began a conflict with Spain that became the War of Devolution.  After taking Charleroi, Tournai and Douai, French troops laid siege to Lille, at that time part of the county of Flanders under Spanish rule.  Siege techniques applied by the French military engineer Vauban were instrumental in their capture.

Battle of Patay: The Battle of Patay (18 June 1429) was the culminating engagement of the Loire Campaign of the Hundred Years' War between the French and English in north-central France.  It was a major victory for the French and with heavy losses inflicted on the corps of veteran English longbowmen.  This victory was to the French what Agincourt was to the English.  Although credited to Joan of Arc, most of the fighting was done by the vanguard of the French army as English units fled, and the main portions of the French army (including Joan herself) were unable to catch up to the vanguard as it continued to pursue the English for several miles.

Battle of Kaba: The Battle of Kaba was fought at Kaba, Fiji, in 1855 between Fijian Tui Viti (King) Cakobau and his enemies from Rewa and Bau.  Cakobau was supported by a strong fleet from Tonga, sent by Tu'i Tonga (King) Taufa'ahau (George I) of Tonga and Enele Ma'afu, governor of the Tongan population in Fiji.  The battle was a major victory for Cakobau, thanks mainly to his Tongan allies, and cemented his leadership over Fiji.  It also, however, underlined his dependency on the military power of Tonga, especially since Ma'afu remained in Fiji.

Dean Spade: Dean Spade (born 1977) is a lawyer, writer, and Associate Professor of Law at Seattle University School of Law.  In 2002, he founded the Sylvia Rivera Law Project, a non-profit law collective in New York City that provides free legal services to transgender, intersex and gender non-conforming people who are low-income and/or people of color.  Spade was a staff attorney at SRLP from 2002 to 2006, during which time he presented testimony to the National Prison Rape Elimination Commission and helped achieve a major victory for transgender youth in foster care in the Jean Doe v. Bell case.  More recently, Spade was involved with the campaign to stop Seattle from building a new jail.

Campaign in north-east France (1814): The 1814 campaign in north-east France was Napoleon's final campaign of the War of the Sixth Coalition.  Following their victory at Leipzig (1813), Russian, Austrian and other German armies of the Sixth Coalition invaded France.  Despite the disproportionate forces in favour of the Coalition, Napoleon managed to inflict many defeats, especially during the Six Days Campaign.  However, the Coalition kept advancing towards Paris, which capitulated in late March 1814.  As a result, Napoleon was deposed and exiled to Elba and the victorious powers started to redraw the map of Europe during the First Treaty of Paris and during the early stages of the Congress of Vienna.

Supporting paragraphs: Campaign in north-east France (1814) Treaty of Paris (1814)
Answer: victory at Leipzig