I am trying to decipher the units named by my GGG Grandfather in his pension papers.

"I was enrolled in April 1861 in 'Iron City Guards' to serve for three months but was not mustered into the U. S. Service and received no pay. At the close of the term, I, in company with a number of men, with the consent of the officers, retired. The company was then mustered into the U.S. Service for three years as Co. C, Pa. Reserves. I returned to Pittsburgh and assisted in recruiting [Thompson's] Battery C, Independent Pa. Artillery [Volunteers] in which I mustered as Sergeant." ...we know further that He was discharged from this unit August 23, 1863, at Harrisburg, PA. He was promoted to Second Lieutenant in Tyler's Park Battery Pa. Volunteers and mustered out on Aug. 24, 1863. He reenlisted that month (August 1863) in Park Battery, Penna Light Artillery Volunteers, under Captain Horatio Tyler, as a 2nd Lieutenant. While on duty in Frederick City, Maryland, in February, 1862, he was "injured by overmarching resulting in varicose veins in his left leg, followed by rheumatism." He was discharged on Jan. 28, 1864. Carolyn Edith Birchard Learned remembers seeing documentation noting William John's survival of the Battle of Antietam (Sharpsburg, Maryland, 1862).

He is not listed in the Muster Roll of the Iron City Guards as he indicated he was not mustered in.

I have found his records with Thompson's Battery but have not been able to locate "Tylers Park Battery". Do you know what it's official designation was?

Thank you,

Rick.