The U.S. Department of Defense is dramatically escalating spending on critical minerals essential for weapons systems and military infrastructure, triggering alarm among Indigenous communities whose ancestral lands face mining expansion.

The Pentagon has identified lithium, graphite, cobalt, and rare earth elements as strategic priorities. These minerals power advanced electronics, battery systems, and missile components. Pentagon budget documents show defense investments in domestic critical mineral extraction and processing have grown substantially in recent years, though exact figures remain classified across multiple appropriations.

The acceleration stems from supply chain vulnerabilities exposed during the COVID-19 pandemic and geopolitical tensions with China, which controls roughly 60 percent of global rare earth processing capacity. The Defense Logistics Agency and U.S. Geological Survey have jointly mapped domestic mineral reserves, with particular focus on western U.S. deposits on federal lands and tribal territories.

Indigenous nations from the Southwest to Alaska report increased prospecting activity and preliminary development proposals on or near their lands. Tribal leaders warn that rapid extraction could damage water systems, wildlife habitat, and sacred sites. The Navajo Nation, home to substantial uranium and lithium deposits, has experienced decades of mining contamination. Similar concerns emerge from tribes in Montana, Idaho, and other western states where graphite and cobalt deposits overlap with tribal jurisdictions.

The Pentagon argues domestic sourcing reduces dependence on adversarial nations and strengthens national security. The Defense Department has not initiated formal consultation with affected tribes on extraction timelines or environmental protocols, according to tribal representatives interviewed by Grist.

Environmental reviews for proposed mining operations remain preliminary. The National Environmental Policy Act requires federal agencies to evaluate impacts before authorizing projects, but expedited permitting timelines under national security justifications could compress review periods that typically span years.

The conflict reflects a fundamental tension in decarbonization strategy. Transitioning the U.S. military to renewable energy sources requires the same battery metals