Deep in California’s high desert, row after row of U.S. Army tanks, Humvees, and armored carriers sit baking in the sun. More than 20,000 vehicles, lined up like a mechanical graveyard, stretch across 36,000 acres of barren land. To the outside world, it appears to be mass abandonment—but the truth is far more complex.In this episode, we uncover the hidden history of Sierra Army Depot, the Army’s vast storage site for America’s war machines. From its World War II origins to the Cold War buildup and its modern role as both scrapyard and lifeline for the military, this is the story of how and why California became home to the largest tank depot in the United States.