Editing 1917 (section)

=== May ===
{{main|May 1917}}
* [[May 3]] &ndash; WWI: [[1917 French Army mutinies]] begin.
* [[May 9]] &ndash; WWI: The [[Nivelle Offensive]] is abandoned.
* [[May 13]] &ndash; Nuncio Eugenio Pacelli, the future [[Pope Pius XII]], is consecrated [[Archbishop]] by [[Pope Benedict XV]].<ref>''[[L'Osservatore Romano]]'', Weekly Edition in English, 12/19 August 1998, p. 9.</ref>
* [[May 13]]&ndash;[[October 13]] (at monthly intervals) &ndash; 10-year-old [[Lúcia Santos]] and her cousins Francisco and Jacinta Marto report experiencing a series of [[Marian apparition]]s near [[Fátima, Portugal]], which become known as [[Our Lady of Fátima]].
* [[May 15]] &ndash; [[Robert Nivelle]] is replaced as Commander-in-Chief of the [[French Army in World War I|French Army]], by [[Philippe Pétain]].
* [[May 18]] &ndash; WWI: The [[Selective Service Act of 1917|Selective Service Act]] passes the [[United States Congress]], giving the [[President of the United States|President]] the power of [[conscription]].
* [[May 21]] &ndash; Over 300 acres (73 blocks) are destroyed in the [[Great Atlanta fire of 1917]] in the United States.
* [[May 22]]
**The [[NOAA Commissioned Officer Corps|Commissioned Officer Corps]] of the [[United States Coast and Geodetic Survey]] is established.
**[[Lynching of Ell Persons|Ell Persons]] is lynched in Memphis, in connection with the rape and murder of 16-year-old Antoinette Rappal.
* [[May 23]]
** A month of civil violence in [[Milan]], Italy ends, after the Italian army forcibly takes over the city from anarchists and anti-war revolutionaries; 50 people are killed and 800 arrested.<ref>{{cite book|last=Seton-Watson|first=Christopher|year=1967|title=Italy from Liberalism to Fascism: 1870 to 1925|location=London|publisher=Methuen & Co. Ltd|pages=468–9}}</ref>
** WWI: During the [[Stalemate in Southern Palestine]], the [[Raid on the Beersheba to Hafir el Auja railway]] by the British [[Desert Column]] takes place: large sections of the railway line linking [[Beersheba]] to the main [[Ottoman Army|Ottoman]] desert base are destroyed.
* [[May 26]] &ndash; A [[May–June 1917 tornado outbreak sequence|tornado]] strikes [[Mattoon, Illinois]], causing devastation and killing 101 people.
* [[May 27]]
** WWI: [[1917 French Army mutinies]]: Over 30,000 French troops refuse to go to the trenches at [[Missy-aux-Bois]].
** [[Pope Benedict XV]] [[Promulgation (Catholic canon law)|promulgates]] the [[1917 Code of Canon Law|1917 ''Code of Canon Law'']].