Brussels Anti-Slavery Conference 1889–90
The Brussels Anti-Slavery Conference of 1889–1890 was held from 18 November 1889 to 2 July 1890 in Brussels and concluded with the adoption of the Brussels Conference Act of 1890 on the prohibition of slave trade and slavery in Africa. The convention favoured colonial policies, justified by the anti-slavery argument.
Source: Wikipedia — Brussels Anti-Slavery Conference 1889–90 (CC BY-SA 4.0)