The military philosophy of the Galactic Empire was internally focused and heavily incorporated the “Tarkin-doctrine”, which mandated “rule through fear of force”, rather than “force itself”, would ensure peace and stability across the galaxy. Unlike their Clone Wars predecessors, Imperial Stormtroopers were primarily an internal security and peacekeeping force that had never faced large scale conflict until the latter years of the Galactic Civil War. Disloyalty or failures were heavily punished and individualism was discouraged; command structure was sacred and disobeying orders (no matter how irrational) was forbidden. This meant Imperial Stormtroopers lacked improvisation and were highly ineffective when cut off from command, but also allowed the best trained soldiers who prefer death over retreat.
As established in the original Star Wars trilogy of films, the troopers’ most distinctive equipment is their white battle armor, which completely encases the body and typically has no individually distinguishing markings.
The order of battle of the Stormtrooper Corps is unspecified in the Star Wars universe. Accompanying the Imperial Navy, stormtroopers are able to be deployed swiftly and respond to states of civil unrest or insurrection, act as a planetary garrison, and police areas within the Galactic Empire. They are shown in collective groups of varying organizational sizes ranging from squads to legions and for some, their armor and training are modified for special operations and environments.