On AlteredRP, there are factions present in the HaloRP server that players are required to have an approved application before they can create or transfer characters to that faction.
“The Brute Bloodpack is one of the main factions that the player can join. The faction is unique...Brute Bloodpack
“The UNSC Provosts Corps (Also known as Military police, Provosts or MPs), are concerned with law...Military Provost
“"Branch of the UNSCDF responsible mostly for naval operations in space, though they sometimes...Navy
“"Serve as medical specialists for the UNSC Navy and UNSC Marine Corps. They serve in a wide...5th MEU Forward Medical Support Detachment