Editing 1919 (section)

===May===
{{main|May 1919}}
* [[May 1]] &ndash; [[May Day Riots of 1919|May Day Riots]] break out in [[Cleveland, Ohio]], United States; 2 people are killed, 40 injured, and 116 arrested.
* [[May 2]] &ndash; [[Weimar Republic]] troops and the [[Freikorps]] occupy [[Munich]] and crush the [[Bavarian Soviet Republic]].
* [[May 3]] &ndash; [[Amānullāh Khān]] attacks the British government in India.
* [[May 4]]
** The [[May Fourth Movement]] erupts in China as a result of the decision at the Paris Peace Conference to transfer former German concessions in [[Jiaozhou Bay]] to Japan rather than return sovereign authority to China.
** The [[League of Red Cross Societies]] is formed in Paris.<ref>{{Cite web|url=https://www.ifrc.org/en/who-we-are/history/|title=History – IFRC|website=www.ifrc.org|access-date=2019-06-07}}</ref>
* [[May 6]] &ndash; The [[Third Anglo-Afghan War]] begins.
* [[May 8]]–[[May 27|27]] &ndash; [[United States Navy]] [[Curtiss Aeroplane and Motor Company|Curtiss]] [[flying boat]] [[NC-4]], commanded by [[Albert Cushing Read]], makes the first [[transatlantic flight]], from [[Naval Air Station Rockaway]] to [[Lisbon]] via [[Trepassey]], [[Newfoundland (island)|Newfoundland]] (departs [[May 16]]) and the [[Azores]] (arrives [[May 17]]). (On [[May 30]]–[[May 31|31]] it flies on to [[Plymouth]] in England.)
* [[May 9]] &ndash; In Belgium, a new electoral law introduces [[universal manhood suffrage]] and gives the franchise to certain classes of women.
* [[May 14]] &ndash; The [[University College of Wales, Aberystwyth]], establishes probably the world's first chair in [[International relations|International Politics]], endowed by [[David Davies, 1st Baron Davies|David Davies]] and his sisters in honour of [[Woodrow Wilson]], with [[Alfred Eckhard Zimmern]] as first professor.<ref>{{cite web|title=The Legacy of One Man's Vision|url=http://www.aber.ac.uk/en/interpol/about/|publisher=Aberystwyth University, Department of International Politics|access-date=2015-01-27}}</ref>
* [[May 15]]
** [[Greek landing at Smyrna]]: The [[Hellenic Army]] lands at [[İzmir|Smyrna]] assisted by ships of the British [[Royal Navy]].
** A law providing for full [[women's suffrage]] in the [[Netherlands]] is introduced.
** [[Winnipeg general strike]]: Workers in [[Winnipeg]], Canada, begin a strike for better wages and working conditions; the strike lasts for six weeks.<ref>{{cite book|author=J. M. Bumsted|title=The Winnipeg General Strike of 1919: An Illustrated History|publisher=Watson & Dyer|year=1994|page=29}}</ref>
* [[May 19]]
** [[Mustafa Kemal Atatürk]] lands at [[Samsun]] on the [[Anatolia]]n [[Black Sea]] coast, marking the start of the [[Turkish War of Independence]]. The anniversary of this event is also an official day of Turkish Youth.
** Volcano [[Kelud]] erupts in [[Java]], killing about 5,000.
* [[May 23]] &ndash; The [[University of California]] opens its second campus in Los Angeles. Initially called [[Southern Branch of the University of California#Southern Branch of the University of California (1919-1927)|Southern Branch of the University of California]] (SBUC), it is eventually renamed the [[University of California, Los Angeles]] (UCLA).
* [[May 25]] &ndash; [[Estonian War of Independence]]: [[Estonia]]n forces capture [[Pskov]] from the [[Red Army]], and soon hand it over to the [[White Movement|White forces]].
* [[May 27]]
** [[Fyodor Raskolnikov]] is exchanged for 14 British prisoners of war.
** Siege of [[Spin Boldak]] ([[Third Anglo-Afghan War]]). This is the last time the [[British Army]] uses an [[escalade]].<ref>{{cite book|chapter=Last time the British army used scaling ladders|title=Military|first1=Jeremy|last1=Beadle|author-link1=Jeremy Beadle|first2=Ian|last2=Harrison|series=Firsts, Lasts & Onlys|location=London|publisher=Robson|isbn=9781905798063|page=112|date=2007}}</ref>
* [[May 29]]
** [[Eddington experiment]]: [[Albert Einstein|Einstein]]'s theory of [[general relativity]] is tested by [[Arthur Eddington]]'s observation of the "bending of light" during a total [[solar eclipse]] in [[Príncipe]], and by [[Andrew Crommelin]] in [[Sobral, Ceará]], Brazil (confirmed [[November 19]]).<ref>{{cite journal|last=Dyson|first=F. W.|author2=Eddington, A. S.|author3=Davidson, C. R.|year=1920|title=A Determination of the Deflection of Light by the Sun's Gravitational Field, from Observations Made at the Solar eclipse of May 29, 1919|journal=[[Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences]]|volume=220|issue=571–581|pages=291–333|bibcode=1920RSPTA.220..291D|doi=10.1098/rsta.1920.0009|url=https://zenodo.org/record/1432106|doi-access=free}}</ref>
** The [[Republic of Prekmurje]] formally declares independence from [[Hungarian Soviet Republic|Hungary]].
* [[May 30]] &ndash; By agreement with the United Kingdom, later confirmed by the [[League of Nations]], Belgium is given the [[League of Nations mandate|mandate]] over part of [[German East Africa]] ([[Ruanda-Urundi]]).