Question: Gerard Brantsen was one of the Dutch signatories to the treaty ending a war that began in what year?

Context paragraphs:
Treaty of Phoenice: The Treaty of Phoenice, also known as the Peace of Phoenice, was a treaty ending the First Macedonian War.  It was drawn up at Phoenice in 205 BC.

Demilitarisation: Demilitarisation or demilitarization may mean the reduction of state armed forces.  Demilitarisation in this sense is usually the result of a peace treaty ending a war or a major conflict.  A drastic voluntary reduction in size of a victorious army is called demobilization.  Demilitarisation was a policy in a number of countries after both world wars.  In the aftermath of World War I the United Kingdom greatly reduced its military strength.  The resulting position of weakness during the rise of the Nazi regime in Germany was among the causes that led to the policy of appeasement.

Indian barrier state: The Indian barrier state or buffer state was a British proposal to establish a Native American state in the portion of the Great Lakes region of North America west of the Appalachian Mountains, and bounded by the Ohio and Mississippi rivers and the Great Lakes.  The concept of establishing such a state, first conceived in the late 1750s, was part of a long-term plan to reconcile the Indian tribes to British rule and diminish hostilities between the tribes and the British Army following its victory in the French and Indian War.  After the region was assigned to the United States in the 1783 treaty ending the American Revolutionary War, British officials pursued efforts to organize the various tribes within it into a sort of Confederation that would form the basis of an Indian state, independent of the United States and under their tutelage, as a way to protect their fur trade ventures in the region and to block anticipated American attacks upon their remaining North American possessions.

Fourth Anglo-Dutch War: The Fourth Anglo-Dutch War (1780–1784) was a conflict between the Kingdom of Great Britain and the Dutch Republic.  The war, contemporary with the War of American Independence, broke out over British and Dutch disagreements on the legality and conduct of Dutch trade with Britain's enemies in that war.

Siege of Mangalore: The Siege of Mangalore was conducted during the Second Anglo-Mysore War by Tipu Sultan and forces of the Kingdom of Mysore against a British East India Company garrison led by Colonel Campbell.  The port city of Mangalore on the west coast of India was besieged from 20 May 1783 until the garrison capitulated on 30 January 1784 after being reduced to starvation; of the original garrison of 700 British soldiers and 2000 Indian troops there were only 850 survivors.  The siege was one of the last major actions of the war; Mangalore was where the treaty ending the war was signed in March 1784.

Gerard Brantsen: Gerard Brantsen (1734 or 10 January 1735 in Arnhem – 21 December 1809 in Arnhem) was a Dutch politician and diplomat.  He was one of the Dutch signatories to the treaty ending the Fourth Anglo-Dutch War in 1783.  He was also mayor of Arnhem in 1762 and 1765, and several times an alderman of this city.

Spanish Treaty Claims Commission: The Spanish Treaty Claims Commission was established by the United States at the conclusion of the Spanish–American War for the purpose of carrying out one of the terms of the treaty ending the war.  The Commission was created by an Act of Congress approved March 2, 1901.  Working from 1901 to 1910, the Commission resolved nearly $65 million in claims, and awarded less than $1.5 million.

Treaty of Melno: The Treaty of Melno (Lithuanian: "Melno taika" ; Polish: "Pokój melneński" ) or Treaty of Lake Melno (German: "Friede von Melnosee" ) was a peace treaty ending the Gollub War.  It was signed on 27 September 1422, between the Teutonic Knights and an alliance of the Kingdom of Poland and the Grand Duchy of Lithuania at Lake Melno (German: "Melnosee", "Meldensee"; Polish: "Jezioro Mełno"), east of Graudenz (Grudziądz).  The treaty resolved territorial disputes between the Knights and Lithuania regarding Samogitia, which had dragged on since 1382, and determined the Prussian–Lithuanian border, which afterwards remained unchanged for about 500 years.  A portion of the original border partially survives as the border between the Republic of Lithuania and Kaliningrad Oblast, Russia, making it one of the most stable borders in Europe.

Treaty of Warsaw (1745): The Treaty of Warsaw was a diplomatic agreement signed in Warsaw on 8 January 1745.  Its birthplace is traced back to Leipzig, Germany.  It was an agreement between Great Britain, Austria, the Dutch Republic and Saxony (the Quadruple Alliance) to uphold the pragmatic sanction enabling their favored candidate Maria Theresa to take the throne of the Austrian Empire.  It also helped the Austro-Saxon alliance secure "the pecuniary support of the maritime powers by the treaty of Warsaw" (Horn, 34).  This brought Saxony into intimate relations with Britain for the first time.  It is considered to be merely the specifying and fixing down of what had been shadowed out as secret modifiers stated in the Union of Warsaw.  The treaty was for reconquering Silesia and “for cutting down that bad neighbor to something like the demensions proper for a Brandenburg Vassal”.  The treaty also aimed to hold together in affairs of the Reich unlike the Frankfurt Union as “30,000 Saxons conjoined to the Austrian force for which the sea powers will furnish subsidy”.  The Treaty was Proposed by the Hungarian and Polish Majestys, Secret Articles, an ulterior Project; however, the sea powers disagreed to this project.  A notionally defensive alliance, it came during the War of the Austrian Succession and within months all the signatories were in an alliance against France.  Along with the sudden death of the Bavarian king, it dramatically changed the balance of power in Germany.  The Allies were ultimately successful in securing recognition for Maria Theresa at the Treaty of Aix-la-Chapelle.  The treaty was secret until Friedrich II discovered it in 1756, and made it known to the world.  The treaty was never absolutely accomplished.

Cold peace: A cold peace is a state of relative peace between two countries which is marked by the enforcement of a peace treaty ending the state of war while the government or populace of at least one of the parties to the treaty continues to domestically treat the treaty with vocal disgust.

Supporting paragraphs: Gerard Brantsen Fourth Anglo-Dutch War
Answer: 1780