|Ussalry Is the Collaboration of The Month|
|Allies||Toa Mata/Toa Nuva, Mata Nui Military, Chronicler's Company|
|Enemies||Teridax, Infected Rahi, other threats|
|Goal||Defend Onu-Koro (formerly)|
Defend Onu-Metru (formerly)
Defend Matoran on Spherus Magna
The Ussalry was the Onu-Matoran branch of the Mata Nui Military on Mata Nui, and later Metru Nui and Spherus Magna. Led by High Commander Onepu, they were the third largest force of the Mata Nui Military, behind the Ta-Koro Guard and Gukko Force.
The Ussalry was founded during the Great War to defend Onu-Koro from the infected Rahi used by Makuta Teridax. They were hard-pressed during this war, to the point of being unable to spare Ta-Koro even a single regiment. At the end of this war, after the arrival of the Toa Mata, they fought in the first Battle of Kini Nui alongside the Chronicler's Company.
After the Matoran of Mata Nui returned to Metru Nui, the Ussalry continued to function as a military for Onu-Metru. Even after the Matoran Universe was evacuated in the aftermath of the Battle of Bara Magna, the Ussalry continued to operate.