The EU Monitoring Mission in Aceh (AMM), Indonesia, marks a new step on the path of the Union to becoming a global player. Endowed with a robust mandate including monitoring demobilisation, the decommissioning of arms, the withdrawal of government forces, the reintegration of former combatants and the launch of a new political process, this new ESDP mission has so far provided an effective contribution in ending years of fighting and paving the way to sustainable peace.