Blockade of Zanzibar
The blockade of Zanzibar (1888–1889) was a joint international operation led by Germany, with the support of the British Empire, Portugal and Italy, against the Sultanate of Zanzibar, with the aim of ending the slave and arms trade off the eastern coast of Africa. This coalition aimed to coerce Sultan Khalifa bin Said of Zanzibar into rigorously enforcing existing treaties that prohibited the maritime slave trade and the illicit arms trade emanating from his East African dominions.