The Mountain Trooper is a ranged infantry unit, it is available starting in the Commerce Age, and like the Skirmisher, is effective against Heavy infantry and Light cavalry, but weak against Heavy cavalry and Artillery. Mountain Troopers have the same hit points, attack, range, multipliers, resistance and cost values of the Skirmisher, but lesser line of sight and trains slightly faster, and like the Salteador, units hit by Mountain Troopers have their line sight temporarily revealed.
Also, Mountain Troopers benefit from the Skill Promotion. They increase their Range and Rate of Fire after defeating a military enemy unit, up to a maximum of three enemy units. Mountain Troopers get +1 range and -10% rate of fire after defeating the first enemy unit; +2 range and -20% rate of fire for the second defeated unit; +3 and -30% rate of fire for the third defeated unit.
The Mountain Trooper is based on the Gebirgsschützen (Mountain Riflemen, in German), a traditional company of mountain rangers from Upper Bavaria. It started as a local militia force, and eventually became part of the Bavarian Army as Jaegers and other light infantry regiments.
The Mountain Trooper wears a Tracht, a traditional costume from German-speaking countries usually associated with the Bavarian and Austrian region, with a gamsbart (a plume of fur made from chamois hair) decorating his hat.
The House of Wittelsbach ruled Bavaria from the medieval period up through the 20th century. Holding a significant amount of territory in the Alpine region, it drew on the people there when fielding portions of its armies. Alpine troops were excellent marksmen with a longstanding tradition of experienced hunting and mountain navigation techniques. Uniquely for many troops of the time, they often used horns for communication when many armies had moved onto newer instruments or techniques.
Mountain Trooper image from the Compendium section