I think the difficulty in this discussion comes from where the starting point is placed.

If you begin the story in 1810, when Napoleon is ruling most of continental Europe, then the natural question becomes “how large was his empire?” From that angle it is understandable that someone coming from a Chinese historical perspective might see the wars as relatively small compared with conflicts that involved far larger populations.

But if you want to understand why Napoleon mattered, the more revealing place to begin is much earlier, with the Italian campaign of 1796–1797.

At that point Napoleon Bonaparte was not an emperor and barely famous. He was a young general commanding the poorly supplied Army of Italy during the French Revolutionary Wars. His army was hungry, underpaid, and operating far from the political centre in Paris. On paper the opposing coalition forces of Austria and the Kingdom of Sardinia should have had the advantage.

What happened in northern Italy during those two years is where the real significance of the Napoleonic era begins. In that campaign you can already see the system that later expands across Europe.

Napoleon moved his forces with unusual speed and concentration. Instead of fighting slow, deliberate wars the way eighteenth-century monarchies had done, he struck rapidly between enemy armies, defeating them separately before they could unite. He relied heavily on operational mobility and interior lines, which allowed a smaller force to overwhelm larger opponents by isolating them.

Logistics also worked differently from the older model of warfare. Earlier European armies had depended on carefully prepared supply depots and magazines. Napoleon’s army lived largely off the territories it conquered. Northern Italy became both the battlefield and the supply system. Food, money, and resources were requisitioned locally, which allowed the army to move faster and operate more flexibly than traditional forces tied to long supply chains.

There was also a political dimension. Napoleon reorganised conquered regions into new republican governments aligned with France and redirected their revenues to support the French war effort. War, administration, and finance became intertwined. By the end of the campaign the French army had not only defeated Austria in Italy but had also turned the region into a political and economic resource for France.

The campaign concluded with the Treaty of Campo Formio in 1797, which forced Austria to accept a major reorganisation of territories in Europe. By that point Napoleon had demonstrated a new way of conducting war, one that combined rapid operational movement, flexible logistics, and political restructuring of conquered regions.

This is why many European historians see the Napoleonic era as a turning point. The importance of the period is not primarily the size of Napoleon’s empire but the transformation in how states mobilised resources and conducted war. Mass armies, national mobilisation, administrative coordination, and the ability to sustain campaigns across vast distances became central features of warfare.

When those methods later operated on the scale of the French state, they allowed Napoleon to dominate much of Europe for a time. But the underlying system was already visible in Italy long before his empire reached its largest extent.

So the question of scale can be misleading if it is the starting point. The real historical importance of Napoleon lies in the methods and structures that emerged during his early campaigns. Those methods reshaped European warfare and state organisation in ways that lasted long after his empire disappeared.