He was also considered an innovator in military art, using both his topographical knowledge and sensitivity for human detail, and a talented engraver, known for his landscapes of Savoy and of other scenes throughout Europe during the Empire's campaigns.

He lived in Sallanches, where his two children, Joseph Albert (22 July 1789) and Marie Louis François (12 January 1792), were born.

He became director of the topographical office of the Emperor from 1804 until 1814, and followed Napoleon everywhere both in peacetime and on military campaigns, and was his closest advisor on strategic planning.

Bacler d'Albe holds a rarified place amongst Napoleon's contemporaries, distinguished in particular by his longevity, their closeness, and the unique character of his role.

He combined all of the geographic and military information available on a map he kept up to date for the emperor both in peacetime and during conflicts, making him Napoleon's closest advisor.

In practical terms, The general staff of the army, commanded by Louis-Alexandre Berthier, transmitted and defined Napoleon's orders, but without taking part in the decision making.

[9] Consequently, military historian Ronald Pawly wrote that "during wartime, Bacler d'Albe was the second most important person in the Imperial headquarters."

[12] Bacler d'Albe's endless work for such a demanding master brought him great honours, as he was promoted to Colonel in 1807, and later Brigadier general in 1813.