Editing 1918 (section)

=== May ===
{{main|May 1918}}
* [[May 1]] – WWI: German troops enter [[Don Host Oblast]]; they capture [[Rostov-on-Don]] on [[May 8]].
* [[May 2]] – [[General Motors]] acquires the [[Chevrolet Motor Company]] of [[Delaware]].
* [[May 7]] – WWI: The British capture [[Kirkuk]].
* [[May 9]] – WWI – [[Second Ostend Raid]]: The British Royal Navy unsuccessfully attempts, for a second time, to seal off the German U-boat base here.
* [[May 11]] – The [[Mountainous Republic of the Northern Caucasus]] is officially established.
* [[May 12]] - The {{HMT|Olympic}} rams into the [[SM U-103]], sinking it. resulting in the deaths of 9 people
* [[May 14]] – The Three Minute Pause, initiated by the daily firing of the [[Noon Gun]] on [[Signal Hill (Cape Town)|Signal Hill]], is instituted by [[Cape Town]] Mayor Sir [[Harry Hands]]. It will inspire the introduction of the [[two-minute silence]] in [[November 1919]].<ref>Royal Canadian Legion Branch # 138.[http://people.becon.org/~rcl138/milestone.php  "2-Minute Wave of Silence" Revives a Time-honoured Tradition]. Accessed on 5 June 2014.</ref>
* [[May 15]]
** The [[Finnish Civil War]] ends.
** The [[United States Postal Service|United States Post Office Department]] begins the world's third regular [[airmail]] service, between [[New York City]], [[Philadelphia]] and [[Washington, D.C.]]<ref>The first was from Allahabad to Naini Junction in India on [[18 February]] [[1911]], and the second from London to Windsor Castle on [[22 June]] [[1911]].</ref>
* [[May 16]] – The [[Sedition Act of 1918]] is approved by the U.S. Congress.
* [[May 20]] – The small town of [[Codell, Kansas]] is hit for the third year in a row, on the same date, by a [[tornado]].
* [[May 21]] – The United States Army Aviation Section is separated from the [[Signal Corps (United States Army)|Signal Corps]], and divided into the [[Division of Military Aeronautics]] and the Bureau of [[Aircraft]] Production.
* [[May 24]] – Women in Canada, excluding residents of [[Quebec]], are [[Women's suffrage in Canada|granted the right to vote]] in federal elections.<ref>{{Cite web|url=https://lop.parl.ca/sites/ParlInfo/default/en_CA/ElectionsRidings/womenVote|title=Women's Right to Vote in Canada|website=lop.parl.ca|access-date=2018-02-22}}</ref>
* [[May 26]] – The [[Transcaucasian Democratic Federative Republic]] is abolished; Georgia declares its independence as the [[Democratic Republic of Georgia]].
* [[May 27]] – WWI: The [[Third Battle of the Aisne]] commences.
* [[May 28]] – [[Armenia]] and [[Azerbaijan]] declare their independence as the [[First Republic of Armenia]] and the [[Azerbaijan Democratic Republic]] respectively.
* [[May 29]] – WWI: The week-long [[Battle of Sardarabad]] concludes with defending Armenian forces victorious over the Ottomans.
* [[May 29]]–[[May 30|30]] – WWI: [[Battle of Skra-di-Legen|Battle of Skra di Legen]] – The Greek [[National Defence Army Corps]] defeats the Bulgarians.