During the Siege of Paris in 1870-1871, balloons carried mail and passengers out of the besieged city, establishing the first regular balloon mail service in history. Over 66 unmanned balloons carried approximately 2.5 million letters out of Paris, while homing pigeons brought replies back, creating a remarkable communication system under extraordinary circumstances.

The balloon post during the siege inspired poetry celebrating human resilience and ingenuity under pressure, with the fragile balloons becoming symbols of hope escaping confinement. French poets composed verses about letters carried by balloon, exploring themes of separation, communication, and the persistence of human connection despite military blockade, while the episode influenced later literary treatments of war and civilian experience.