system
Given the following post, respond as if you're commenting on Reddit:
human
[WH40k] What does space marine combat training actually consist of?
gpt
Everything you would imagine it would, but more rigorous.

They learn to shoot, sure, but they will also learn the recoil and spray patterns and the very "feel" of an assortment of weapons. They will learn how to wield a number of melee weapons, but will also be taught when and why to use them. They will learn the limits of their bodies and their power armor such that they become one and the same. They will learn tactics built upon a foundation of literally countless battles over the course of millennia. They will learn to work as tight-knit teams with any peers under any circumstances. They will learn of the enemies they will face in excruciating detail.

They will learn how to effectively harness their loathing and despair and vigor, and they will learn to know no fear. They will learn to be the very fire that brings light to the darkness. They will hone themselves into the point of the Emperor's spear. They will be the very weight of our Lord's hammer. They will become paragons of virtue and justice and unmitigated power such that they can once again bring all of Humanity to a golden era of superiority.

Space Marines spend every second of their waking lives, from the time they were basically toddlers, honing and perfecting their bodies and their minds. They are molded into the absolute epitome of what a soldier should be in any given circumstance or situation.