SABOT

S.A.B.O.T, also more formally known as Special Assault Boarding Operations Team, is a special operations strike force of the Icarusian Empire and later, the Icarusian Kingdom. It was formed specifically for the task of boarding hostile warships. They were the first of their kind in the Milky Way while the UEF relied on its other special operations units to do the task of boarding. 
SABOT gained fame during the 1st Interstellar war in several battles when they boarded UEF ships and proved to be fierce and brutal but efficient fighters, often overrunning the larger defending security forces of a ship in small numbers. They became much less relevant however when the war shifted towards the Sentinel Wars where boarding Sentinel ships were much less possible and almost impractical due to the Sentinel's robotic nature. Nontheless they continued to see action, ironically, often defending their own ships from attempted Sentinel boarding parties.