What immediate logistical problem necessitated Nicolas Appert's invention during the Napoleonic era?

Answer

Feeding large armies far from home

The primary impetus for the research grant offered by Napoleon Bonaparte was not abstract scientific interest but a concrete, critical military requirement. During the extensive wars characterizing the late 18th and early 19th centuries, maintaining logistical supply lines for large standing armies positioned far from their supply bases proved immensely difficult. Food spoilage was a constant threat, leading to widespread sickness among troops, severely reducing operational readiness, and causing massive economic waste. Securing a reliable, transportable, and non-perishable source of food was deemed paramount to achieving success in these prolonged military campaigns.

What immediate logistical problem necessitated Nicolas Appert's invention during the Napoleonic era?
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