With increasing extreme weather events and natural disasters, rising tensions in the Indo-Pacific and Europe, and fluctuating fuel prices, how to maintain combat readiness, boost energy independence and reduce personnel injuries have become key focuses of military operations. Green energy is thus regarded as an important solution to strengthening national security and military resilience. Its advantages such as minimal noise and exhaust emissions could reduce the fuel demand and improve the reconnaissance capabilities of tactical tools. Defense departments in the United States, the United Kingdom, Japan and other countries have therefore proposed plans to adopt green energy for tactical and non-tactical vehicles to better allocate combat resources. Cases include replacing non-tactical vehicles with electric ones, building green energy microgrids in camps combining the use of solar, biomass and geothermal energy, reducing energy density in buildings and carbon emissions of military logistics, developing hybrid-powered tactical vehicles and warships. This chapter thus suggests that Taiwan’s defense authority could also follow similar strategies to the "Taiwan 2050 Net-Zero Emission Pathway" just rolled out. Through actively seeking research and development opportunities with domestic industry to replace non-tactical vehicles with electric ones, deploy decentralized green energy grids, and advance tactical vehicles and power propulsion equipment, Taiwan’s defense resilience and combat capacity would be further strengthened.