If you are considering a Master degree in Germany, some possibilities you make take into account are:

• Universität Erfurt: MA in Public Policy
• Universität Hamburg: MA in Peace and Security Studies
• Universität Marburg: MA in Peace and Conflict Studies
• Universität Potsdam: MA in War and Conflict Studies
• E.K. Universität Tübingen: MA in Public Policy and Social Change