Editing 1937 (section)

===April===
{{Main|April 1937}}
* [[April 1]]
** [[Colony of Aden|Aden]] becomes a British [[crown colony]].
** The [[Bombing of Jaén]] is carried out in Spain, by the [[Condor Legion]] of the [[Nazi Germany|Nazi German]] [[Luftwaffe]].
* [[April 9]] – The ''[[Kamikaze (1937 aircraft)|Kamikaze]]'' arrives at [[Croydon Airport]] in London; it is the first Japanese-built aircraft to fly to Europe.
* [[April 12]] – [[Frank Whittle]] ground-tests the world's first [[jet engine]] designed to power an aircraft, at [[Rugby, Warwickshire|Rugby, England]].<ref>*{{cite book|last=Golley |first=John |title=Genesis of the Jet: Frank Whittle and the Invention of the Jet Engine|publisher=Crowood Press|year=1997|isbn=1-85310-860-X|pages=86–91}}</ref>
* [[April 20]] – A fire in an elementary school in [[Kilingi-Nõmme]], [[Estonia]], kills 17 students and injures 50.
* [[April 26]] – [[Spanish Civil War]]: The [[Bombing of Guernica]] is carried out in Spain, by the [[Condor Legion]] of the [[Nazi Germany|Nazi German]] [[Luftwaffe]], in support of the [[Francoist Spain|Francoist]]s. Three-quarters of the town is destroyed and hundreds killed.<ref>Journalist [[George Steer]]'s report to ''[[The Times]]'' (London) connects Germany with the attack.</ref>