Some special troops wear devices that allow them to move at great speed across the battlefield. This makes them especially good at assaulting enemy troops but also allows them to make sweeping advances around the unguarded flanks and rear of enemy positions. These devices, normally only used by special troops, are generally called jump packs but they vary immensely from race to race. For example, Space Marine Assault troops and Ork Stormboyz use screaming jet turbines to provide the lift needed to move a fully armed warrior across a battlefield, while Eldar Swooping Hawk Aspect warriors soar aloft on raptor wings of light alloys powered by a silent gravitic motor. Jump pack troops also include more exotic types of warrior such as Eldar Warp Spiders who use teleport devices to achieve their mobility and Chaos Daemons who use their supernatural powers.
Whatever their type, jump pack troops fight in squads just like other troops. They check morale in the same circumstances as ordinary troops – enemy fire, losing an assault and tank shock.