The impact of climate change on the U.S. military and the defense industry is manifold, ranging from geopolitical and humanitarian aspects to facility, force, and equipment planning. Major climate threats with an immediate effect on the U.S. military include storms, flooding, drought, desertification, wildfires, and thawing permafrost. Another vital factor is the energy consumption of the U.S. armed forces, the world’s leading military. High energy demands play a complicated role in risk emergence and risk mitigation. The Department of Defense has recognized these threats, however, efficient cooperation with state leadership is necessary to evade risks. The anticipated effects of climate change may prove to be both a challenge and an opportunity for the defense industry.