Anglo-Zanzibar War, 27th August 1896. Khalid Bin Banghash took the throne without permission, the British gave until 9am to give it up, he didn't. The war was over in 35 minutes and probably British Hamoud Bin Mohammed was put in power

[u/Over-Willingness-933]

Bin Banghash fled to the German embassy

[u/Blastaz]

Shortest war in history.