Editing 1918 (section)

=== April ===
{{main|April 1918}}
[[File:Lady_Duff_Gordon_styles_sketched_by_Marguerite_Martyn,_1918.jpg|thumb|right|300px|Styles of [[Lucy, Lady Duff-Gordon]], as presented in a vaudeville circuit pantomime and sketched by [[Marguerite Martyn]] of the ''St. Louis Post-Dispatch'' in April 1918]]
* [[April 1]] – The [[Royal Flying Corps]] and the [[Royal Naval Air Service]] in Britain are merged to form the [[Royal Air Force]], the first autonomous Air Force in the world.
* [[April 5]] – [[Sālote Tupou III|Sālote]] succeeds as Queen of [[Tonga]]; she will remain on the throne until her death in [[1965]].
* [[April 6]] – [[Finnish Civil War]]: The [[battle of Tampere]] ends.<ref name="tampere"/>
* [[April 8]] – [[Operations against the Marri and Khetran tribes]] in [[Balochistan]] end with surrender to the British authorities.
* [[April 9]] – [[Union of Bessarabia with Romania]]: [[Bessarabia]] votes to become part of the [[Kingdom of Romania]].
* [[April 21]] – WWI: [[Manfred von Richthofen]], "The Red Baron", the war's most successful fighter pilot, dies in combat at Morlancourt Ridge near the Somme River.
* [[April 22]] – [[Armenia]], [[Azerbaijan]], and [[Georgia (country)|Georgia]] declare their independence from Russia as the [[Transcaucasian Democratic Federative Republic]].
* [[April 23]] – WWI:
** [[Conscription Crisis of 1918]] in Ireland: A [[general strike]] is held here against conscription.
** [[Zeebrugge Raid]]: The British Royal Navy attempts to seal off the German [[U-boat]] base here.<ref name=CBH>{{cite book|last=Palmer|first=Alan|last2=Palmer |first2=Veronica|year=1992|title=The Chronology of British History|publisher=Century Ltd|location=London|pages=355–356|isbn=0-7126-5616-2}}</ref>
** [[First Ostend Raid]]: The British Royal Navy unsuccessfully attempts to seal off the German U-boat base here.
* [[April 28]] – WWI: [[Gavrilo Princip]], assassin of [[Archduke Franz Ferdinand of Austria]], dies in [[Terezin]], [[Austria-Hungary]], after three years in prison.
* [[April 30]] – WWI: The [[Second Transjordan attack on Shunet Nimrin and Es Salt]], launched by units of the Egyptian Expeditionary Force, ends on [[4 May]], with their withdrawal back to the Jordan Valley.