The Danger Marines are steadfast defenders of the Imperium. Epitomizing the ideal of service unto the end, the Danger Marines do not leave a warzone until their objectives are secured and the war is won. This has lead to truly heroic stands lasting for days on end till reinforcements arrive or the enemy breaks on their stubborn defenses.
With such attrition-style combats, The Danger Marines are used to major injuries. It is common to see Battle brothers sporting Augmentic limbs and bionic replacements for parts lost in battle. It is seen as a badge of honor; to give a part of oneself for the inevitable victory of humanity.
The utmost respect is paid to battle brothers who serve even after their mortal injuries. The Chapters Dreadnoughts are heroes, every one. Their tales recorded on bronze slabs that decorate the chapters flagship, their names engraved in young Scouts weapons to bless them with heroic fortitude and lifelong service.
With the abundance of bionics and dreadnoughts, the Apothecarions and forges aboard each ship are conjoined to expedite the servicing of devastating injuries and extensions of lifetimes. The two branches are so inter-connected that Techmarines body armor is white like an Apothecaries, with only their helmets and shoulders painted in Martian Red.