| Summary/Abstract |
Several nations experimented with military ballooning in the mid-nineteenth century, despite limitations such as lack of controllability. The key factor in whether or not the belligerents perceived ballooning as valuable was the type of warfare involved. When balloons were used in static warfare, such as siege conditions, their usefulness usually encouraged further experimentation. The American Civil War draws some stark contrasts between what balloons could do during static warfare, such as the siege of Island No. 10, and what they could not do in fluid combat, as in the failure at First Bull Run. Later, Brazil employed former Union aeronauts during the siege of Humaita in Paraguay, following which the French pioneered balloon “air mail” from besieged Paris during the Franco-Prussian War. Enemy efforts to defeat ballooning included Prussian invention of what may be the world’s first purpose-built anti-aircraft gun, making the point that if an enemy thinks an innovation is valuable, then it is.
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