Amphibious Assault Units were used pre Zuvic Incursion when river based expeditions were considered viable.
Squads of these units would proceed down rivers (man made) to get to out of reach facility entrances in zodiac craft.
Approximately 300 were converted and retrained from the standard ranks of HQ sectors and configured into this unit type.
Proceeding up narrow rivers, in uncovered zodiacs, with no where solid to land except concrete landings where CPD had control most of the time....you can imagine their success.... or lack of
when avoiding the enemy fire often they would land their craft near by, however the ground besides the river banks was often liquified and the units were lost quite quickly in that, or sprayed by the enemy units near bye while they were stuck sinking.
After almost a third were lost in the first month of operations the remaining units were moved to various sectors, however kept at the ready for water born missions.
This unit re-emerged out of stasis after being misappropriated only to be taken out rather quickly.