Your faction player must be at least rank 2 (which is roughly 24 hours of faction term service and depending on the faction may be anywhere from -1 up to 5 points. Varying on the ranking % of your current faction, which you can view on the myuog section of the site.)
Faction War Horses cost 3,000 gold and 500 Silver.
Silver can be accumulated by killing enemy faction players, removing faction traps or killing their affiliated faction monster.
True Britanians: Silver Serpents
Council of Mages: Wisps
Followers of Minax: Ogre Lords
Legion of ShadowLords: Daemons
For more in-depth information concerning factions, you can visit www.uo.com or
http://uo.stratics.com
Take care.