Fair, but they also carried considerably less weight at 40-50lbs versus the 80lbs that a Roman legionnaire carried and the 100-120lbs troops deployed in Afghanistan could be carrying.

The Civil War actually looks like it was a low point in historical military kit weights. (see The History of the Soldiers Load by Lieutenant Rob Orr Volume 7, Number 2, Winter 2010 https://www.army.gov.au/our-future/australian-army-research-... )