Ussalry

The Ussalry was an Onu-Matoran branch of the Mata Nui Military on Mata Nui. It rode Ussal crabs, such as Pewku. These allowed them to move quickly and carry messages between themselves with ease. It is unknown whether it stayed together on Metru Nui or Spherus Magna.

They participated in the Matoran-Rahi War and the The Battle of Kini-Nui I with the Chronicler's Company. The Ussalry was hard-pressed during this war, to the point that it was unable to spare Ta-Koro even a single regiment. The forces of the Ussalry were divided into regiments.

The Ussalry was the third largest force on the island of Mata Nui, behind the Ta-Koro Guard and Gukko Force. Its leader was High Captain Onepu, and two of its members were Damek and Kaj.

Equipment
The most frequently used weapons and units by the Ussalry were:
 * Mountable ussal crabs, hence the name, "Ussalry"
 * Boxor mechs, a vehicle created by Nuparu out of defeated Gahloks
 * Pick-axes
 * Kohlii sticks
 * Kanoka disks

As the third-largest military, Onu-Koronan Guards had access to a large arsenal. While the Ta-Koro Guard had the most skilled foot soldiers and the Gukko Force had the island's only known air force, the Ussalry was built around its mounted force, being the first and the largest military in the Mata Nui Military to do so. Although the Ussalry would eventually help the Ga-Koro Defense Force train crabs for its military, the Ussalry remained until that point the only known military to use any sort of ground mount for battle purposes. Though they mostly relied on the versatile Ussal crab, which they used for both civilian and military use, so much so that it is their namesake, the Ussalry was full of engineers, one of whom created the ingenious Boxor tanks using the parts of defeated Gahloks. That same engineer, Nuparu, also used tamed Bohrok for an unknown amount of time, but it is unknown if some of these Bohrok were integrated into the Ussalry or the Mata Nui Military at all. Nuparu also attempted to recreate the Exo-Toa suit, which he intended to mass-produce for the Ussalry, but had to help repair Metru Nui and soon became a Toa, abandoning his goals of furthering the Ussalry's arsenal of tanks. Additionally, it is known that the Ussalry were successful in taming Keras crabs for their Ga-Koro Defense Force counterparts, but it is unknown if the Onu-Matoran trainers ever used them in battle or military exercises. The Ussalry, like all militaries on Mata Nui, used Bamboo Disks, and it is highly likely that the Ussalry used Pickaxes as weapons, since the Sanctum Guard used them and they were made exclusively in Onu-Koro. It is possible, though unlikely, that Kohlii Sticks were used as weapons. The Ga-Koro Defense Force used these sticks in battle, likely because Ga-Koro mass-produced them as fishing rods at the time and that was all some Guards had as weapons; additionally, the Matoran Takua used a Kohlii Stick during a battle against the Rahkshi, and in Onu-Koro, but, again, this was because Takua could use nothing else for defense, and the Ta-Koro Guard did not us these sticks as weapons. The only two known Kohlii Sticks in Onu-Koro both belonged to the Onu-Koro Kohlii Team, as Zemya's Shop did not sell any. The notion that the Ussalry used torches as weapons is also highly unlikely, as no Mata Nui Matoran is known to use fire as a weapon, although the Onu-Koronans did use light as a defense to keep Rahi out of Onu-Koro and, hopefully, out of their tunnels and the Onu-Koro Highway.

Trivia

 * It is likely that everyone or most everyone in Onu-Koro serves at least part-time in the Ussalry, as its defensive role is so vital to the well-being of the Koro and the entire economy of Mata Nui. This theory could be considered disproven by the fact that in MNOG many major companies that employ Onu-Matoran seem to be left in the dark on the size of available forces, meaning that the company leaders and its workers are not in the Ussalry and therefore do not know how dire the situation is. This is also likely as Onu-Koro is the largest and most profiting Koro in Mata Nui, allowing for specialized Matoran to work either for civilian companies or for the military.