Um, that time period (which is after the ending of the campaign in this one) featured the "Levée en masse," which was the 1st large-scale compulsory conscripting of the Industrial Age. Napoleon's tactics focused on a combination of massed cannons, cavalry charges, and infantry columns breaking through the enemy line and convincing the survivors to leave the field ... bloody, but effective (at the time: imitating them later led to the horrific casualties of the ACW and WWI).
Skirmishers were deployed relatively rarely, and even then they were recalled and re-attached to the assault column. One theater that saw extensive use of skirmishers (and guerrillas) was the Iberian Peninsula,
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