Editing 1756 (section)

=== April–June ===
* [[April 1]] – [[Yirmisekizzade Mehmed Said Pasha]] resigns as [[Grand Vizier of the Ottoman Empire]]. He is replaced by Köse Bahir Mustafa Pasha, who has been Grand Vizier from 1752 to 1755.
* [[April 12]] – [[Siege of Fort St Philip (1756)|Siege of Fort St Philip]] begins when the French under [[Armand de Vignerot du Plessis]], Duke of Richelieu, land near Port [[Mahón]] on [[Menorca]] and besiege the British garrison here in a prelude to the Seven Years' War.
* [[May 17]] – The [[Seven Years' War]] formally begins, when [[Kingdom of Great Britain|Great Britain]] declares war on [[Kingdom of France|France]].<ref name="Cassell's Chronology318"/>
* [[May 20]] – [[Seven Years' War]]: [[Battle of Minorca (1756)|Battle of Minorca]] – The British fleet under [[John Byng]] is defeated by the French under [[Roland-Michel Barrin de La Galissonière]].
* [[June 20]] – A [[garrison]] of the [[British Army]] in [[India]] is imprisoned in the [[Black Hole of Calcutta]].<ref name="Cassell's Chronology318"/>
* [[June 22]] – The [[Coup of 1756]], an attempted [[coup d'état]] planned by [[Louisa Ulrika of Prussia|Queen Louisa Ulrika]] of [[Sweden]], to abolish the rule of the [[Riksdag of the Estates]] and reinstate [[absolute monarchy]] in Sweden with the support of the ''[[Hovpartiet]]'', is exposed and subdued.
* [[June 25]] –  [[The Marine Society]] is founded in [[London]], the world's oldest seafarers' charity.<ref>{{cite web|title=History|url=http://www.marine-society.org/history.aspx|publisher=Marine Society|access-date=2012-01-06|archive-url=https://web.archive.org/web/20120121024741/http://www.marine-society.org/history.aspx|archive-date=2012-01-21}}</ref>
* [[June 29]] – [[Seven Years' War]]: [[Siege of Fort St Philip (1756)|Siege of Fort St Philip]] at Port [[Mahón]]: The British garrison in [[Menorca]] surrenders to the French after two months' siege by the Duke of Richelieu.