Rifleman

Description
Resilient ranged unit.

Can learn Long Rifles.

Captures buildings.

Attacks ground and air units.

Upgrades

 * Ranged Attacks
 * Ranged Units Armor
 * Long Rifles

Strategy
Riflemen are very versatile units: they Capture Buildings, attacks ground and air units.

However, as your army grow, you should focus on more advanced units to strengthen your army: they lack the DPS or utility or other Dwarves units.

The Long Rifles upgrade make them still viable in late game.

Riflemen are hard countered by melee units as they lack move speed to kite and have a Medium armor; you better use Mountain Warriors instead in this case.

If you are lacking Gold, Riflemen have a lower Gold / Food ratio, and can fill your army cheaply.

On the contrary, if you need to rebuild fast but have a lot of Gold, you may want to produce more advanced units instead, as Rifleman's Build Time / Food ratio is higher than them.