The Musketeer is the ranged unit of the Colonial Age and the first unlocked unit of the Colonial Age tech tree.
It is trained in a Musketeer Range, which is 5x3. Compared to its predecessor, the Longbow Archer, it has +6 attack and +6 defense and +1 range, which is a great improvement. It absolutely dominates against all Late Middle Age units, because of its range of 7 that is good enough to protect them from counter attacks on the next turn, even light units. But compared to Colonial Age units, it has only a moderate attack strength and weak defense but effective against both the Imperial Guard and Grenadier. Musketeers in this age have a great advantage of range, but otherwise, it is a moderate ranged unit.
Against Same Age Units[]
Dragoons[]
Dragoons have combat bonuses and high movement speed to counter Musketeers, as well as a super strong defense. Musketeers will therefore be ineffective against Dragoons, and will have a hard time killing them, unless they have an attack bonus. They should also be wary of their low defense as it can be exposed and easily damaged by Dragoons.
Ranger[]
Neither side has bonuses against each other, but with the Ranger's new stealth ability it can be hard for the Musketeer to kill them. However, in hilly and rocky maps with no forests, the Musketeers will have an advantage over them, and with a range of 7, they can hit a Ranger, cause considerable damage and possibly not take a counterattack from them on the next turn.
Grenadier[]
The Musketeer is effective against Grenadiers because of their range of 7 and their combat bonuses. With the Grenadier's range of 2, it is balanced out, so Musketeers will need to rely on their range more in these scenarios.
Field Gun[]
The Field Gun is effective against the Musketeer because of their superior range. Unlike the Cannon, the Field Gun has extra mobility and range to compete against the Musketeer's increased range, so it will be hard for Musketeers to shoot them. However, the Field Gun's damage is not quite up to speed with the Musketeer's defense, so it may take Field Guns more than two hit to kill them, so again it is balanced out. Even with the Field Gun's Dug-In ability, it does not exactly prevent Musketeers from two shotting them.
Other Military Units[]
Legend: 
= Light Unit Class 
= Ranged Unit Class 
= Artillery Unit Class 
= Heavy Unit Class 
= Fast Unit Class