On May 9 – 10, 1860, the Illinois Republican State Convention was held in Decatur.

In May 1860 a significantly amended version of the Act was passed in both houses but was vetoed by President Buchanan.

: May 3, 1860: " Mr. Darwin has written a work which will constitute an era in geology & natural history to show that ... the descendants of common parents may become in the course of ages so unlike each other as to be entitled to rank as a distinct species, from each other or from some of their progenitors ".

Isaac Manuel Francisco Albéniz y Pascual () ( 29 May 1860, Camprodon – 18 May 1909, Cambo-les-Bains ) was a Spanish pianist and composer best known for his piano works based on folk music idioms.

On 12 May 1860, Coleridge's dictionary plan was published, and research started.

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It became the capital of the South African Republic ( ZAR ) on 1 May 1860.

* Friedrich Engels, “ On Rifled Cannon ," articles from the New York Tribune, April, May and June, 1860, reprinted in Military Affairs 21, no.

* Tilley, Nannie May The Bright Tobacco Industry 1860 – 1929 ISBN 0-405-04728-2.

Born as a result of the railroad being built here instead of at Middleton to the west in 1860, Winona was originally a part of Carroll County and was incorporated as a town on May 2, 1861.

* May 18 – Gustav Mahler, Austrian composer ( b. 1860 )

* May 25 – Austin Lane Crothers, American politician ( b. 1860 ).

* May 7 – Herman Webster Mudgett, American serial killer ( b. 1860 )

* May 17 – The German soccer club TSV 1860 München is founded.

* May 20 – Elias M. Ammons, Governor of Colorado ( b. 1860 )

* May 17 – Anne Isabella Milbanke, English wife of George Gordon Byron, 6th Baron Byron ( d. 1860 )

* May 17 – Anna Brownell Jameson, British writer ( d. 1860 )

* May 21 – Jane Addams, American social worker, recipient of the Nobel Peace Prize ( b. 1860 )

* May 23 – Charles Barry, English architect ( d. 1860 )

On May 2, 1860 he tried to reach Garibaldi, who was going to launch his famous Expedition of the Thousand in southern Italy.

This famous general entered Palermo with his troops ( the “ Thousands ”) on May 27, 1860.

There had been many accidents when cast iron beams collapsed suddenly, such as the Dee bridge disaster of May 1847 and later failures such as the Wooton bridge collapse and the Bull bridge accident of 1860.

The town is famous for the landing of Garibaldi on 11 May 1860 ( the Expedition of the Thousand ) and for its Marsala wine.

On 11 May 1860 the landing in Marsala of Giuseppe Garibaldi took place.

The treaty was signed in Moscow on May 26, 1972 by the President of the United States, Richard Nixon and the General Secretary of the Communist Party of the Soviet Union, Leonid Brezhnev ; and ratified by the US Senate on August 3, 1972.

On 17 / 30 May a peace treaty was signed between Turkey and the Balkan Alliance.

The BIPM was created on 20 May 1875, following the signing of the Metre Convention, a treaty among 51 nations ().

Greece was the only Balkan country with a navy powerful enough to deny use of the Aegean to the Ottoman Empire, thus a treaty between Greece and Bulgaria became necessary ; it was signed in May 1912.

Seeing the omens, Greece and Serbia started a series of negotiations and signed a treaty on 1 June ( 19 May ) 1913.

In May of that year the Russians agreed to sign a treaty giving independence to Austria, and paved the way for a Geneva summit with the U. S., U. K. and France.

Since 3 May 1814, the Sovereign Principality of Elba was created a miniature non-hereditary Monarchy under the exiled French Emperor Napoleon I. Napoleon I was allowed, by the treaty of Fontainebleau with ( 27 April ), to enjoy, for life, the imperial title.

As of May 2012, 177 governments had adopted the treaty.

Barely a month later, on May 2, he signed a treaty of amity with the Italians, which apparently gave them control over Eritrea, the Red Sea coast to the northeast of Ethiopia, in return for recognition of Menelik's rule.

A second conference was held at The Hague in May 1911, and out of it came the first international drug control treaty, the International Opium Convention of 1912.

John and Philip negotiated the May 1200 Treaty of Le Goulet ; by this treaty, Philip recognised John as the rightful heir to Richard in respect to his French possessions, temporarily abandoning the wider claims of his client, Arthur.

When this agreement became public in May 1922, bitter resentment was expressed in Germany, but the treaty was still ratified by both countries.

The treaty was opened for signature on September 16, 1987, and entered into force on January 1, 1989, followed by a first meeting in Helsinki, May 1989.

# Processing communications submitted to treaty bodies under optional procedures and communications under the procedures established by the Economic and Social Council in its resolution 1503 ( XLVIII ) of 27 May 1970 and ensuring follow-up.

On 31 May 1188 he concluded a treaty with the Romans which removed long standing difficulties, thus returning the Papacy to Rome.

No sooner had the treaty been ratified in May 1213 than Pandolfo announced to Philip that he would have to abandon his expedition against John, since to attack a faithful vassal of the Holy See would constitute a mortal sin.

In May 1918, Romania was in no position to continue the war, and negotiated a peace treaty with Germany ( see Treaty of Bucharest, 1918 ).

In May 1991, Lebanon and Syria signed the treaty of brotherhood, cooperation, and coordination called for in the Taif Accord, which is intended to provide the basis for many aspects of Syrian-Lebanese relations.

On May 9 a peace treaty was signed in Tokyo, with the French being coerced by the Japanese into relinquishing their hold on the disputed territories.

The treaty was ratified by Turkey on 23 August 1923, Greece on 25 August 1923, Italy on 12 March 1924, and Japan on 15 May 1924.

The Ottoman Empire broke the treaty after just two months by invading the newly created Democratic Republic of Armenia in May 1918.

The founding treaty was established under the initiative of the Soviet Union and signed on 14 May 1955, in Warsaw.

* May 21 – Mexican Revolution: A peace treaty is signed between Madero ' rebels and government troops in Ciudad Juarez.

* May 30 – First Balkan War: A peace treaty is signed in London, ending the war.

* May 18 – German reunification: East Germany and West Germany sign a treaty to emerge their economic and social systems, effective July 1.