What does the word substitution after name and entry date on Regiment roster mean?

The term "substitution" after a name and entry date on a regiment roster typically indicates that the individual listed was a substitute for another person, often in the context of military service. This practice allowed individuals to pay someone else to serve in their place during conscription or enlistment. The substitution would be formally recorded to clarify that the original individual was not present and that the substitute took their place in the regiment. This is important for maintaining accurate records of service and accountability within military units.