A crucial moment in the establishment of a European security culture was the bombardment of Algiers in 1816 by an Anglo-Dutch fleet, after which the Regent of Algiers was forced to sign a declaration renouncing the age-old practice of keeping captured Christian sailors for ransom. Against the dominant depiction of the Anglo-Dutch cooperation as a coincidence, this chapter argues that it was a carefully planned engagement based on shared security concerns. The Vienna settlement provided the context and main incentives for the Anglo-Dutch attack on Algiers. As such, this study of the connections between the Congress and the 1816 bombardment illustrates how peace in Europe fostered cooperative security practices that could bring about violence and destruction beyond the continent.