XV25 Stealthsuit - History: The Kappa Mortis Incident was an important event that contributed to the future use of XV25 Stealthsuits. An Ultramarines strike force sent to the planet of Kappa Mortis managed to recover a single XV15 Stealthsuit helmet from a crashed Aquila Lander bearing captured Tau technology. This forced the Tau Earth Caste to accelerate development of a new type of Stealthsuit, rushing the single-weapon XV25 Stealthsuit into service ahead of the much more difficult to produce XV22 Stealthsuit they had hoped to introduce en masse. This caused XV15 Stealthsuits to become less common in Tau Hunter Cadres due to their replacement as the standard Stealthsuit by the newer XV25.During the Taros Campaign, the deployment of XV25 Stealthsuits proved to be an important component of the overall Tau strategy for victory. Stealthsuit Teams would be inserted behind enemy lines where they would continually ambush and wreak havoc upon Imperial supply lines, causing food and water shortages for Imperial forces on the frontline. XV25 Stealthsuits struck to sow panic and confusion whilst sabotaging the Imperial advance, before fading back into cover. Entire divisions of Imperial Guard were taken off the front lines in desperate attempts to hunt them down. XV25 Stealthsuit Teams proved to be a major factor in the outcome of the conflict when the lack of critical water supplies in the harsh desert conditions caused an ultimate Imperial withdrawal from the world due to heavy losses from dehydration.XV25 Stealthsuits were used as part of the first deployment of a specialist Stealthsuit formation known as the "Nighthunter Stealth Group," during the bitter fighting against WAAAGH! Skarkill. The Orks had captured an Imperial Mining World and were using the human colonists as slave workers to collect the planet's rich deposits of iron ore. This ore was used to begin the construction of a Stompa mob. The Tau found themselves hard-pressed to meet the Orks in open battle. Instead, Tau forces attacked the valuable mines, forcing the Greenskins onto the defensive. In doing so, the Tau gained the initiative in the conflict. In battle after battle, the Tau deployed their new Nighthunter formations. Each stealth group was inserted deep behind Ork lines or within the mine complexes themselves, using their stealth field generators to remain concealed. When the Hunter Cadres assaulted the Orks head-on in the mine complexes, the stealth groups opened fire on the Orks from the rear, negating the benefit of any cover they had taken amongst the overhead buildings. In all, the Nighthunter groups were deployed on 24 occasions. Though 8 of these groups were lost to Ork counter-attacks, WAAAGH! Skarkill was ultimately defeated thanks to their efforts. Warboss Skarkill's beloved Stompa mob was, thankfully for the Tau Empire, never built.During the Achilus Crusade in the Jericho Reach, Stealth Teams of the Velk’han Sept were left behind on those worlds from which the Tau had willingly withdrawn. The Stealth Teams were used to confound Imperial forces that came to these worlds after the Tau withdrawal, and gather strategic data on the xenos' strength and tactics so the Tau Fire Caste could ascertain the strength of the human foe before committing their forces en masse.