Each company in a Chapter of the Adeptus Astartes falls under the command of a Captain.

Space Marines on the defence fight with a tenacious fury. Captains will take up heavy bolt rifles to lay down punishing fire and wear Gravis armour to withstand the foe's best attempts to dislodge them. Fighting in such a way, they are a symbol of the Space Marines' indomitable will to never fail.

Primarily a defensive weapon, the Firestrike Servo-turret lays down withering volleys of fire to secure flanks or the Space Marines’ base of
operations.

Eyes blazing and fists crackling with roiling energies, Space Marine Librarians stride into battle to destroy their foes.

Lieutenants act as the right hands of their Captains by providing flexibility and helping to direct their battle-brothers in engagements. They are often entrusted with direct battlefield command of a demi-company or strike force – handling squad-level combat logistics and acting as exemplary leaders.

Lieutenants act as the right hands of their Captains by providing tactical flexibility and helping to direct their battle-brothers in war.