This is UMS Space Marine. Regular Unit of UMS Army. They are your cover in every situation, and every moment. The most disciplined men at UMS Army.
The Skaarj Mercenary Commando. They work for anyone who will pay them good. Most of them are origin Skaarj which were kicked from Skaarj Empire cause they weren't strong enough to serve the Queen of Death. Mostly they cooperate with you, but there are also units which are working for your enemies.
Nali Warrior. Nali were enough peaceful to the present day. But now it's time for revenge. After UMS started global operation on Na Pali, Nali decided to cooperate with UMS Goverment. UMS promised to them, that they'll retrieve freedom and independence forever, by eliminating Skaarj Empire from Na Pali.
UMS has got also lighter unit on disposition, than UMS Marines. When speed and stealth is required, this special units are called to stand to fight. Light commando units, trained almost same like UMS marines, are one of the most sudden strike forces on UMS disposition. NOTE: Also they are appearing as normal crew-members of stations, ships etc. but still they are military.
Same as Man light commando, womens are very often more determined than mens which they make them more comfortable to use by UMS Goverment. Also they are bit faster than mens. NOTE: Also they are appearing as normal crew-members of stations, ships etc. but still they are military.