The Treaty of London (also known as the Anglo-Dutch Treaty of 1824) was an international bilateral treaty signed on 17 March 1824 between the United Kingdom and the Kingdom of the Netherlands establishing territorial spheres of influence in Southeast Asia.
Provisions Regarding Aceh
Under the treaty, Britain ceded its settlements in Sumatra to the Netherlands in exchange for Malacca. A specific note attached to the treaty stipulated that the Netherlands would respect the independence of the Sultanate of Aceh, while requiring the Netherlands to ensure the safety of shipping against piracy in northern Sumatran waters.
The treaty’s guarantee of Acehnese sovereignty restricted direct Dutch military action against Aceh until its revision by the Treaty of Sumatra in 1871.
See Also
Source
De expeditiën naar Atjeh 1873-1874, W.W.F. Herfkens, Koninklijke Militaire Academie, 1900, pp. 2, 4.