Marine shock trooper

Marine shock troopers also known as shock marines, orbital troopers, assault troopers or spearhead troopers is a sub-branch of the Federation Space Marine Corps. They act as a quick reaction and rapid deployment forces, light infantry and pathfinders for planetary invasions or assaults.

They often are the spearhead of planetary invasions or assaults, often being dropped down in drop pods from ships in orbit to secure landing zones, provide forward reconnaissance and destroy key targets such as anti-aircraft guns or surface-to-orbit cannons if possible. Because of this they are often expected to take heavy casualties. As a result of such expectations, shock troopers often only recruit volunteers and are given high wages, more luxuries and large insurances to one's family should they perish. But it is also because of this, shock trooper training is brutal and thorough, almost akin to that of special forces training.

History
Marine shock troopers was originally concepted in 2110 and founded in 2111 during the Federation-Pirate War or the First Space War as an experimental unit. The first unit being known as the 87th Assault Company and was further expanded to include a second unit, the 102nd Assault Company.

Both companies saw action in the Pirate War and proved highly successful as more shock and/or assault companies were created and attached to multiple Space Marine units.

First Space War / UEF-Pirate War
Conceived after the disastrous Battle for Planet Linea, in which both UEF Space Marines and the UEF Army suffered heavy casualties as a result of being unable to establish and sustain a effective landing point or beachhead on the surface for reinforcements, shock troopers were to be created from the experience of the battle and were initially to be focused entirely on a offensive type doctrine. This doctrine called for rapid deployment and reinforcement to establish and sustain a beachhead or landing zone/point for heavy reinforcements such as tanks from either the Army or the Space Marine Corps to arrive. This however, also called for special and thorough training.

At first, it was mostly made up of volunteer and handpicked space marines from 12th Battalion, 1st Space Marines, who had saw heavy action and was extremely experienced in 'spearhead' warfare. These handpicked and volunteers became known as the 87th Assault Company. During this time, they shared almost no difference to a normal space marine except that they were much more harden for combat and focused almost entirely on lightning fast offensives and breakthrough operations.