Translate Arabic faithfully. British **balloon barrages** were a key part of the United Kingdom’s air-defence system during the Second World War, especially throughout the Blitz, and they were designed to make low-level bombing and strafing by Nazi aircraft far more dangerous and ineffective. These barrages consisted of large, unmanned balloons tethered to the ground by long, strong steel cables, forcing German pilots to fly higher where bombing accuracy dropped and where anti-aircraft guns and RAF fighters were more effective. The balloons themselves were typically pear- or sausage-shaped and made from rubberized cotton fabric sealed to hold **hydrogen gas**, which was chosen because it was much lighter than air and easier to produce in large quantities than helium, despite being highly flammable. Each balloon could reach heights of around **5,000 feet (1,500 m)**, and the real weapon was not the balloon but the **steel cable** hanging beneath it; these cables were thick enough to tear into an aircraft’s wings or propellers, often causing catastrophic damage or forcing pilots to climb rapidly to avoid them. Some cables were fitted with special devices called **parachute-and-cable units**, which would detach if struck, wrapping around aircraft parts and increasing the chance of a crash. Structurally, a barrage balloon system included the balloon envelope, internal gas compartments, reinforced attachment points, winches, anchoring blocks, and mobile or fixed ground stations operated by trained crews—many of whom were women from the Auxiliary Territorial Service. The balloons could be raised, lowered, or rapidly reeled in depending on weather conditions or friendly air activity, since strong winds, lightning, or friendly aircraft required careful control. In terms of effectiveness, while balloon barrages did not stop bombing entirely, they **successfully reduced low-altitude attacks**, protected vital targets such as factories, ports, power stations, and city centers, and forced the Luftwaffe to adapt tactics that were less accurate and more costly. By the height of the war, tens of thousands of barrage balloons were deployed across Britain, forming a visible and psychologically powerful symbol of resistance in the skies, proving that even relatively simple technology—when used intelligently—could significantly blunt the impact of advanced enemy air power.