Been done before.
Operation Outward.
“Been done before. Operation Outward.”
Operation Outward - Wikipedia
Operation Outward was a British plan during the Second World War to attack Germany by means of free-flying balloons.It made use of cheap, simple balloons filled with hydrogen. The balloons carried either a trailing steel wire to damage high voltage power lines by producing a short circuit or incendiary devices to start fires in fields, forests and heathland.