This book results from the compilation of different case studies from the ALiSEA Small Grant Facility and other research work carried out since 2015. ALiSEA funded 26 initiatives to support agroecology activities in the Mekong region, which were translated into several knowledge products. These later were reviewed and harmonized to produce this capitalization book. The small grant initiatives were implemented by a broad diversity of stakeholders and participated to change the agriculture sector at different levels, from production unit to policy level. ALiSEA considers these stories as first hand and precious illustrations from the field, which could inspire others to act for a transition toward agroecology in the Mekong region.