Both sides respected the Commonwealth's neutrality, but positioned themselves strategically to take advantage of any change in the situation. Union forces established Camp Clay in Ohio just north of the city of Newport, Kentucky and Camp Joe Holt in Indiana opposite Louisville, Kentucky. Meanwhile, Confederate troops constructed Forts Donelson and Henry just across Kentucky's southern border in Tennessee, and stationed troops fewer than 50 yards from Cumberland Gap. Volunteers from the Commonwealth left the state to join up with whichever side they favored. Some covert recruiting also took place. Nearly 60 infantry regiments served in the Union armies versus just 9 in the Confederate. However, a rather large number of cavalry outfits joined the latter. John Breckenridge originally commanded the "Orphan Brigade" of the Army of Tennessee, consisting of the 2nd, 3rd, 4th, 6th, and 9th Kentucky Infantry. The brigade's nickname came about allegedly because the soldiers' home counties were occupied by Union troops for most of the war and they couldn't go home to them.