Robert Stewart, Viscount Castlereagh, Foreign Secretary of the United Kingdom, and Hendrik Fagel, Minister of State, of the Kingdom of the United Netherlands—without a civil war—sign the 1813 Convention of London, banning the international slave trade.
[added 12/11/2021]
Subsequent Events:
References:
CHRONOLOGY: Who banned slavery when? | Reuters
www.reuters.com/article/idUSEIC16869120070321