The 316th Infantry Corps. were a battalion of Clone Troopers during the middle of the Clone Wars Era led by Jedi General Ric Jark and Lieutenant Flexor.
The battalion was involved in several small missions and battles, until Jedi General Ric Jark met his fate while destroying a droid outpost.
Lieutenant Flexor was eventually reassigned to the 101st Airbourne Corps. shortly before Sergeant Trix's death; to whom Flexor was promoted to being an ARC Trooper/Officer known as ARC Lieutenant Flexor.
The battalion was very short-lived.
ARC Lieutenant Flexor is one of the only Elite Clone Officers under the rank of Lieutanant to be promoted to ARC Trooper/Officer.
Ric Jark's species (Maridrid) is considered to be rare.