Mandalorians

Mandalorians are a grey-skinned humanoid race native to the planet Mandalore in the Milky Way Galaxy. They are well-known for their physical strength and agility and their warrior culture and signature armor. They cannot use supernatural powers of the Living Force.

They became a subject race of the Inhumans, serving them as shock troops and body guards, and helped to cement Inhuman control of the local galaxy. When the Mandalorians first contaced the Kree, some Mandalorians defected to the rising Kree Empire and even converted to Supreme Intelligence worship.

With access to Hyperdrive-equipped warships, a number of Mandalorians left Kree-controlled space and provided their services to varioous factions as mercenaries, including the Skrull Empire, the Sith, and to a lesser degree the Shi'ar Empire, the Galactic Republic and the Jedi.

By 1000 years ago, the Mandalorians had as a whole rose up against the declining Kree Empire and fairly rapidly established their independent area, Mandalorian space. The Mandalorian sentiment at the time was that the Kree's clout in the known universe was in serious decline.