4 ways to preserve or restore peace between conflicting states*

1. diplomatic engagement (persuasion)
2. threat of military action (persuasion/coercion)
3. actual use of limited military force (coercion)
4. combination of diplomacy along with any of the two others (persuasion and coercion)
   
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   *based on Henderson 1998
   Note: military (hard power); diplomacy (soft power)