Contrary to what I have ordinarily understood, German storm trooper tactics and storm trooper units as employed by the German during the Great War [WW1] an evolutionary process culminating of course in the German Spring Offensive of 1918.
Riga and Caporetto be fully aware NOT the first instances of institutionalized storm trooper units as used on the battlefield by the German.
A Storm Troop [battalion sized unit] consisting of German soldiers of the highest quality physically and mentally, possessing proven and demonstrable coolness and ability in combat. Entire battalions of such soldiers organized for hazardous missions.
Missions hazardous in the extreme. As originally envisioned to capture a section of enemy trench but not much more than that. Given the over-the-top mass wave attack disasters of the various combatants during the earliest stages of the Great War, merely capturing an enemy trench was considered a considerable success.
See this You Tube video the evolutionary aspects of the German Storm Troop during the Great War. Taktik during the German Spring Offensives of 1918 the mission of the Storm Troops not confined to capturing a mere stretch of trench. To the greatest extent possible continuing the offensive, the target those rear-echelon forces of the adversary. Destroy any ability for allied combatants to reconstitute as fighting units.