Editing 1913 (section)

=== Date unknown ===
* Between the two Balkan Wars, a group of Bulgarian teachers and priests including teacher [[Gligor Zisov]] are deported by the newly-established Greek authorities to Bulgaria but killed by Greek soldiers.<ref>{{cite book|last=Shklifov|first=Blagoy|authorlink=Blagoy Shklifov|title=На кол вода пиехме. Записки за Христовите мъки на българите в Егейска Македония през ХХ век|trans-title=At stake drinking water, Notes on Christ's passion of Bulgarians in Aegean Macedonia during the twentieth century|location=Sofia|language=Bulgarian|year=2011|pages=51–53}}</ref>
* The [[Ahmadiyya Muslim Community]] is established in [[Bengal Presidency|Bengal Province]] (modern-day [[Bangladesh]]).
* [[America Cultural Center]] is inaugurated in [[Salta]], Argentina.<ref>{{Cite web |title=Centro Cultural América, City of Salta. Art Destination Argentina |url=https://universes.art/en/art-destinations/argentina/northwest/salta/city/centro-cultural |access-date=2024-03-03 |website=universes.art |language=en}}</ref>
* French physicist [[Georges Sagnac]] shows that light propagates at a speed independent of the speed of its source.
* [[Camel (cigarette)|Camel]] [[cigarettes]] are introduced by [[R. J. Reynolds Tobacco Company|R. J. Reynolds]] in the United States (the first packaged cigarettes).
* The [[State Security Investigations Service]], the Middle East’s first internal security service is established in [[Khedivate of Egypt|Egypt]].
* [[Prada]] is established as a leather goods dealer in [[Milan]], by [[Mario Prada]] and his brother.
* [[Astra AB|Astra]], a predecessor of the [[AstraZeneca]] global [[healthcare]] and pharmaceutical brand, is founded in [[Södertälje]], [[Sweden]].<ref>{{Cite book|url=https://books.google.com/books?id=KuglCgAAQBAJ&q=Knut+Sj%C3%B6berg%2C+Astra%2C+CEO&pg=PT69|title=L'industria delle Medicine|last=Zirulia|first=Giuliano|year=2015|publisher=Edra Masson|isbn=9788821439049|language=it}}</ref>
* The value of [[International trade|world trade]] reaches roughly $38&nbsp;billion.