The Greater Mekong Subregion (GMS1) Environment Operations Center (EOC) of the Asian Development Bank (ADB) initiated roundtable discussions in March 2013 to (1) bring together organizations working on climate change vulnerability and adaptation assessments (VAAs) in the Mekong region, (2) take stock of ongoing initiatives, and (3) exchange experiences and lessons learned. The Roundtable partners are primarily international development organizations and research institutions working on sustainable livelihoods, natural resources management, and climate change planning in the GMS.