The Head Hunters
The Regiment was raised from the death world of Skorix 4. The physiology of the planet has promoted the evolution of pack predators that are similar to Terran tigers. The Alpha of the pack is generally the largest, and when it is killed the pack breaks apart and flees. This has lead to hunters specifically targeting the Alpha, and the recruited troopers of the regiment being able to pick out the leaders of opposing armies for targeting.
This has lead to the Head Hunters being deployed into war zones where the opposing leaders are vital in holding their forces together.