The Jade Treaty transferred 340 hectares of Oldenburg territory to Prussia, enabling construction of Wilhelmshaven and founding Prussia's first permanent North Sea naval base.
Key Facts
- Date signed
- 20 July 1853
- Territory transferred
- 340 hectares on the western shore of the Jade Bight
- Parties
- Kingdom of Prussia and Grand Duchy of Oldenburg
- Construction began
- 1854 (fortress, naval base, and city of Wilhelmshaven)
- Strategic advantage
- Deep water, good anchorage, ice-free in winter
By the Numbers
Location
Cause → Event → Consequence
During the First Schleswig War of 1848–51, Prussia possessed virtually no navy, and the Danish fleet rapidly destroyed German maritime commerce in the North Sea and Baltic Sea. Prince Adalbert of Prussia had sought to build a Prussian Navy since before 1848, and by 1852 Prussia was expanding its fleet and urgently required a deep-water North Sea port, which it had lacked since the Congress of Vienna.
On 20 July 1853, Prussia and the Grand Duchy of Oldenburg signed the Jade Treaty, by which Oldenburg ceded 340 hectares of territory on the western shore of the Jade Bight to Prussia. Oldenburg, seeking funds to resolve the Bentinck succession dispute, welcomed the arrangement, while Prussia gained access to what was regarded as the finest natural deep-water anchorage on the German North Sea coast.
From 1854, Prussia developed the transferred territory into the fortress, naval base, and city of Wilhelmshaven, which became the nucleus of the modern city. The base provided Prussia with a strategic North Sea presence that proved operationally relevant during the Second Schleswig War of 1864.
Political Outcome
Oldenburg ceded 340 hectares on the Jade Bight to Prussia in exchange for financial compensation, enabling Prussia to establish its main North Sea naval base at Wilhelmshaven.
Prussia lacked a deep-water North Sea port and had minimal naval capability
Prussia gained a strategic North Sea naval base, significantly expanding its maritime power