Abstract Peace operations are often deployed to countries where conflicts are effectively ongoing, with mandates to protect civilians and provide security. With the authorisation to use force beyond self-defence, peacekeepers are expected to exert military pressure on armed groups to induce them to abandon violence and join peace processes. Such an approach falls in the domain of compellence. Given that peace operations struggle to adapt to this new expectation, it is imperative to find effective ways of compelling armed groups. While studies on compellence agree on the effectiveness of denial-type pressure, its specific forms are highly context-dependent. What is the most effective way to achieve denial against armed groups in the context of peace operations? There are four such approaches: attrition, stronghold neutralisation, decapitation, and counter-coercion negation. A case study of peacekeeping by the United Nation in Ituri reveals that stronghold neutralisation and counter-coercion negation were especially important for compelling rebels to disarm. As existing studies have not examined the effectiveness of specific forms of denial in peace operations, the finding contributes significantly to the literature on compellence and peace operations.
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