As a recurring feature of the Cold War that has dominated international relations for the past four decades, foreign intervention in civil armed conflicts has focused and inflamed scholarly debate over the content of the relevant legal restraints. Conflict has raged particularly around the following issues: First, what forms and degree of assistance to rebels constitute an armed attack within the meaning of Article 51 of the Charter authorizing individual and collective self-defense? Second, in cases where assistance does not reach the armed attack threshold, are there any circumstances in which the target state and/or its allies may nevertheless use forceful measures to terminate it?
Becoming Hawkish on Questionnaires: Effects of Partition of Options on Approval of the Use of the Right of Collective Self-defense.