Explosive ordnance (EO) puts one in two people in Syria at risk of death and injury and impedes the delivery of crucial humanitarian assistance. However, the extent of EO in Syria and its devastating impact is not sufficiently known or discussed among donors and humanitarian actors. International humanitarian mine action (HMA) actors operating in Syria for over ten years have come together to address this gap, sharing data and insight from their work on the ground. They produced a report to highlight the extent of EO contamination in Syria; its devastating impact on people, vital infrastructure and provision of humanitarian assistance; the crucial activities performed by humanitarian mine action (HMA) actors; and the action required to address this issue. The main findings of this report are summarised here.