This paper proposes an innovative methodology used by Security Force Assistance (SFA) planners to leverage a sociocultural simulation for exploring climate change dynamics in Army training. This approach was derived from lessons learned during unclassified Joint exercises associated with the simulation of climate adaptation.  According to President Biden’s Interim National Security Strategy climate change poses a growing threat to U.S. national security. This strategy and the 2022 Army Climate Strategy make it imperative for Army operational and strategic exercises to include climate change risks and threats by 2028. The Army’s use of simulation for training of its SFA forces will enable more effective planning for humanitarian assistance and counterinsurgency missions, especially those dealing with emerging requirements for adapting to climate change. Simulation in the field of climate adaptation training to support SFA in humanitarian assistance tasks and improving understanding of emergent counterinsurgencies is critically important to the U.S. military because it can lead to increased stability in developing areas of the world. The Army SFA Proponent and TRADOC G-2 M&S will leverage recent unclassified exercise results to demonstrate how simulation can support Joint and Army training for SFA Climate Adaptation Training in representative “battleground areas” and show what quantitative benefits might accrue for better understanding climate adaptation. This simulation approach may support other equities besides DOD including supporting U.S.  Allies and partners by providing technical assistance, advice, and training to military personnel. Additionally, it may assist stakeholders such as non-governmental and private sector entities who need to be prepared for the aftermath of more frequent and severe extreme weather events. In this paper, the authors argue that the Army will be a more resilient and sustainable land force, able to operate in all domains with effective mitigation and adaptation measures against the key effects of climate change.