I am quite familiar with George - an unsung hero. George wound up being a 2nd Lieutenant in Company G of the 11th Maine. However, he became involved with an early, unofficial, battalion of sharpshooters in the 3rd Brigade, 1st Division of the 10th/24th Corps in 1864 and, when the unit became official, George was their commanding officer.
On April 2nd, 1865, George and his battalion were skirmishers in front of Fort Gregg at Petersburg - the Confederate's last defense. They were tasked with providing supressive fire only - and were not obliged to attack the fort itself. After wave after wave of Union troops had been cut down, George, on his own initiative led his battalion in a desperate assault that breached the sallyport of the fort. The fort surrendered shortly after. George suffered another serious wound in this foray - his 3rd of the war.
I would love to share information on him with you - whatever you have. George has been a mysterious hero to me for a number of years. He HAD been in the regular army - and was a Mexican War Veteran and a veteran of the Seminole Wars in Florida. He was famous for using a heavy sabre which may indicate that he had been a dragoon - heavy cavalry Man.
He died in East Newport, Maine, December 3rd, 1882.