The "proper story" of the barrage balloon is one of a silent, silver sentinel that became an icon of home front defense during World War II . Often called " castles of the air ," these massive hydrogen-filled bags were much more than just floating decorations; they were high-stakes aerial booby traps. Their Primary Purpose: Forcing the High Ground
: Each balloon was tethered by a braided steel cable. If a wing clipped it, the result was almost always a crash—65% of cable strikes resulted in aircraft loss. barrage balloon
: By forcing planes higher, the balloons pushed them directly into the optimum range of anti-aircraft guns , making them easier targets for ground crews. The Operators: The WAAFs and the 320th The "proper story" of the barrage balloon is