History

Major Treaties in History

Name: Major Treaties in History
Creator: Wikipedia
License: https://creativecommons.org/licenses/by/4.0/

Significant treaties and international agreements.

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Updated:2/22/2026

#treaties #diplomacy #history #international

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Year↕	Name↕	Summary↕
1900	Treaty of Paris	Ends all conflicting claims over Río Muni (Equatorial Guinea).
	Treaty of Washington	Seeks to remove any ground of misunderstanding growing out of the interpretation of Article III of the Treaty of Paris (1898) by clarifying specifics of territories relinquished to the United States by Spain.
	Convention for the Preservation of Wild Animals, Birds and Fish in Africa	First international agreement on wildlife conservation.
1901	Hay–Pauncefote Treaty	Replaces the Clayton–Bulwer Treaty.
	Boxer Protocol	Peace agreement between the Eight-Nation Alliance and China.
1902	Anglo-Japanese Alliance	Treaty of alliance between England and Japan; signed by Lord Lansdowne and Hayashi Tadasu.
	Treaty of Vereeniging	Ends the Second Boer War.
1903	Cuban–American Treaty of Relations (1903)	The Republic of Cuba grants the United States the right to lease land in the Guantánamo Bay area.
	Hay–Herrán Treaty	The United States attempts to acquire a lease on Panama.
	Hay–Herbert Treaty	Between the United Kingdom and the United States on the location of the border between Alaska and Canada.
	Hay–Bunau-Varilla Treaty	Establishes the Panama Canal Zone.
	Treaty of Petrópolis	Ends tensions between Bolivia and Brazil over the territory of Acre.
	Southern African Customs Union Agreement	Creates customs union between British colonies and protectorates in Southern Africa.
	International Sanitary Convention	Organized by the French to standardize international quarantine regulations.
1904	Treaty of Peace and Friendship (1904)	Fixes borders between Chile and Bolivia.
	Treaty of Lhasa	Between Great Britain and Tibet.
1905	Treaty of Portsmouth	Ends the Russo-Japanese War.
	Treaty of Björkö	A secret mutual defense accord between the German Empire and Russia.
	October Manifesto	Response to Russian Revolution of 1905. Created the Duma but Tsar Nicholas II of Russia disregarded it after the country was stable again and continued his absolute rule.
	Taft–Katsura Agreement	Japan and the United States agree on spheres of influence in Asia.
	Convention of Karlstad	This treaty dissolves of the union between Norway and Sweden established by the Convention of Moss and Treaty of Kiel in 1814.
	Japan–Korea Treaty of 1905	This treaty deprived Korean Empire of its diplomatic sovereignty, in effect making Korea a protectorate of Empire of Japan; void in 1965.
Treaty 9 (James Bay Treaty)	Conducted at Osnaburgh House trade post, on Lake St. Joseph (Albany River), Ontario, Canada, negotiating an agreement between the Canadian monarch, King Edward VII, and First Nations. There were later adhesions to the treaty.	—
1906	Second Geneva Convention	Specifies the treatment of wounded, sick and shipwrecked members of armed forces at sea.This article appears to contradict the article Second Geneva Convention. Please discuss at the talk page and do not remove this message until the contradictions are resolved. (September 2020)
		This article appears to contradict the article Second Geneva Convention. Please discuss at the talk page and do not remove this message until the contradictions are resolved. (September 2020)
Treaty 10	Conducted at Île-à-la-Crosse and Lac du Brochet, Saskatchewan, Canada, negotiating an agreement between the Canadian monarch, King Edward VII, and First Nations. There were later adhesions to the treaty in 1907.	—
	Treaty of Limits (Brazil–Netherlands)	Defined international boundary between Brazil and Dutch colony of Surinam
1907	Rome Agreement	Arrangement for the creation at Paris of an Office international d'hygiène publique, signed at Rome on 9 December 1907
1909	Anglo-Siamese Treaty of 1909	Formally divides northern Malay states between Siam and the British Empire.
1910	Japan–Korea Treaty of 1910	Begins the period of Korea under Japanese rule; declared null and void in 1965.
	Brussels Collision Convention	Governs apportionment of legal liability in maritime collision cases.
1911	North Pacific Fur Seal Convention of 1911	First international treaty seeking the management and conservation of wildlife.
	Treaty of Daan	Ends the Zaidi insurgency in Yemen in exchange for autonomy within the Ottoman Empire.
1912	First International Opium Convention	The first international drug control treaty.
	Huangpu River Conservancy	Amends the agreement of September 27, 1905, between China and the United States governing the use and conservation of the Huangpu River.
1913	Treaty of London (1913)	Ends the First Balkan War.
	Treaty of Bucharest (1913)	Ends the Second Balkan War.
	Treaty of friendship and alliance between the Government of Mongolia and Tibet	Alliance between Mongolia and Tibet.
	Treaty of Athens	Peace treaty between Ottoman Empire and Greece. Ottoman Empire acknowledges union of Crete with Greece.
	Treaty of Constantinople (1913)	Peace treaty between Ottoman Empire and Bulgaria. Bulgaria acknowledges Ottoman control on Eastern Thrace.