State Line in Virginia was created by the governor in order for the state to have some mililtary force at his command. The Conscript Act of April 16, 1862, took the greater number of Virginia men enrolled in militia units. The Virginia State Line proved inefficient and prior to the spring of 1863 state authorities disbanded it.

Jeff Weaver's research suggests that many former State Line members later entered French's Virginia Battalion. Members of Companies "A" and "D" of French's battalion may have joined Prentice's 7th Confederate Battalion. It's difficult to say for sure because so few records of any of these units -- State Line included -- have survived.

Of course you're correct -- Ashby's Virginia Cavalry regiment had no connection with Prentice's 7th Confederate Cavalry Battalion.