@greatninja3 I don't think so. After all, they are juuuust at the sweet spot, technologically speaking, where this obvious balance tipped.
The reason is because the first firearms could be used by just everyone without requiring a lot of training, meaning even "untrained" recruits could fatally wound a soldier from afar without much of a problem.
All you need is some sort of tactics like the standing & kneeling shooter rotation formation and the enemy can suffer heavy casualties before even engaging in combat.
Of course, this only applies to primitive firearms, nowadays you need training to even shoot a firearm efficiently, especially those made for the battlefield, let alone having knowledge of artillery and explosives like mines, bombs and grenades.
Then again, it's pointless if your technology goes bricked by an E.M.P. or your soldiers are killed by infrasound or radioactive decay, both unable to be detected directly by the human, but very deadly when exposed long enough.