Simplify the following text for a Grade 16 native English-speaking person.
Original: Breckinridge 's forces consisted of Colonel Henry Giltner 's brigade -- formed from the soldiers of the 4th Kentucky Cavalry and the 10th Kentucky Cavalry Battalions -- the 11th Kentucky Mounted Rifles -- later renamed the 13th Kentucky Cavalry Battalion -- and the 64th Virginia Mounted Infantry .
Simplified: Breckinridge 's army consisted of Colonel Henry Giltner 's brigade , ( which was formed from the soldiers of the 4th Kentucky Cavalry and the 10th Kentucky Cavalry ) ; the 10th Kentucky Mounted Rifles ( later renamed to the 13th Kentucky Cavalry ) , and the 64th Virginia Mounted Infantry .