The US Army has introduced a groundbreaking hydrogen fuel cell electric rescue truck, known as the H2Rescue, designed to revolutionize military operations with zero emissions technology. The versatile truck boasts a remarkable 1,500-mile range and is currently in the prototype phase. Its development aims to enhance the Army's natural disaster and emergency response capabilities, providing power, heat, and water for critical functions during crises. The project also includes a solar-powered electrolysis machine on wheels to generate green hydrogen for refueling, reducing the truck's environmental impact and increasing its operational efficiency in remote locations. The fuel cells in the H2Rescue produce water as a byproduct, further contributing to sustainability. The initiative aligns with the Defense Department's climate action goals, emphasizing the importance of emission-free electric vehicles for military operations. Despite challenges in the hydrogen supply chain, efforts are underway to transition to green hydrogen production through water electrolysis powered by renewable energy sources. The potential of green hydrogen technology extends beyond the H2Rescue truck, with ongoing projects exploring mobile green hydrogen generation in austere environments. The Defense Innovation Unit (DIU) is spearheading initiatives to introduce fuel cell technology in tactical vehicles, drones, and other military equipment, enhancing energy resilience and reducing reliance on traditional fuel supplies. The shift towards sustainable fuel solutions not only benefits the environment but also enhances military capabilities in contested logistics environments. This transformative approach underscores the importance of innovation and collaboration in advancing zero-emission technologies for defense purposes, setting a new standard for military operations.