The DFS 230 Assault: How 80 German Glider Troops Captured the World’s Strongest Fortress in May 1940

Could 80 Men and a Fleet of Unpowered Aircraft Destroy the Most Powerful Fortress on Earth? For decades, Allied command staff believed Fort Eben-Emael was an unassailable bastion. Rising above the junction of the Meuse River and the Albert Canal, its steel-reinforced cupolas, underground labyrinths, and long-range heavy artillery formed an impenetrable shield guarding Belgium and the approaches to France. It was engineered to withstand relentless siege artillery, heavy aerial bombing, and full-scale infantry waves. Yet on the morning of May 10, 1940, this multi-million-franc fortress was rendered useless in less time than it takes to conduct a morning guard shift. In The DFS 230 Assault, historian Winston Maddox dismantles popular myths to present a forensic, minute-by-minute account of Operation Granite. Readers who want to experience history rather than simply skim over high-level summaries will find themselves embedded with Group Granite—the 80 paratroopers of Sturmabteilung Koch tasked with an execution plan so radical that Allied intelligence had never even hypothesized its existence. Maddox details the convergence of two technological surprises: the DFS 230 assault glider, capable of silent, high-precision landings in pitch darkness, and the revolutionary Hohlladung (shaped charge), a directed-explosive weapon so secret that troops were sworn to absolute silence under penalty of execution. Through primary combat logs, technical blueprints, and survivor accounts from both sides of the battle, this book reconstructs the chilling psychological reality of a garrison attacked not from the front lines, but directly on their own roof. Witness the silent release over the border, the turbulent glide through morning mist, the crunch of wooden skids across concrete turrets, and the terrifying detonation of 50-kilogram shaped charges that melted thick armor steel like butter. Feel the claustrophobia of over 1,000 Belgian soldiers trapped in underground bunkers as smoke filled the air shafts and their massive guns were silenced one by one. This is not a superficial overview; it is an immersive, granular operational narrative written specifically for the discerning military historian. Beyond the tactical engagement on the roof, Maddox traces the strategic shockwaves that radiated across London and Paris. The fall of Eben-Emael did not merely clear the path for the German 18th Army—it fundamentally erased the centuries-old doctrine of static fortification and gave birth to modern airborne special operations overnight. What happens to a army's strategy when its most impregnable fortress falls before breakfast?