Henry J . Stainrook Henry J . Stainrook , occasionally spelled Steinrock , led a regiment of the Army of Virginia and the Army of the Potomac in the American Civil War . He briefly led a brigade at the Battle of Antietam . Stainrook was killed in the Battle of Chancellorsville . Before Antietam . Stainrook was a resident of Chester County , Pennsylvania , at the outbreak of the war . Following President Abraham Lincoln ' s call for 100 , 00 volunteers to put down the rebellion , Stainrook enlisted on April 23 , 1861 in the Union Army as the captain of Company C of the 22nd Pennsylvania Infantry , a three - months ' regiment . He was honorably mustered out following the expiration of his term of enlistment . Subsequently , Stainrook was involved in organizing the 109th Pennsylvania Infantry and was commissioned its colonel with a nominal date of November 1 , 1861 . The regiment encamped in Philadelphia , Pennsylvania , near the State House before going to Virginia . His unit eventually became a part of the Army of Virginia under Maj . Gen . John Pope . Stainrook was wounded in the abdomen by a shell fragment at the Battle of Cedar Mountain during the Northern Virginia Campaign . The 109th Pennsylvania served in the brigade of Brig . Gen . Henry Prince in the 2nd Division , II Corps at the Battle of Cedar Mountain on August 9 , 1862 . Brig . Gen . Christopher C . Augur led the division , and Maj . Gen . Nathaniel Banks led the corps . In their first battle , the 109th advanced under Confederate fire . Col Stainrook was wounded by Confederate artillery , but he refused to leave the field . The corps missed the Second Battle of Bull Run because it was guarding the army ’ s rear areas . The 109th helped cover the army ’ s retreat , destroying supplies that could not be moved . Antietam . After the removal of John Pope , his army was dissolved ; and its units joined the Army of the Potomac . The old II Corps became XII Corps . Maj . Gen . Joseph K . Mansfield now the corps , and Brig . Gen . George S . Greene led the 2nd division at the Battle of Antietam . After the I Corps had been exhausted in combat , the XII Corps went into the fray . One brigade ( Goodrich ) was detached from Greene ’ s Division to join the Iron Brigade in the vicinity of the Miller Cornfield . The other brigades , under Lt . Col . Hector Tyndale and Stainrook , were committed to an attack on the high ground around the Dunker Church ( Stainrook was without his own regiment , which was on detached duty . ) Stainrook ’ s brigade , after some confusion in deploying , passed through the East Woods , driving away the remains of the division of BG John Bell Hood . Then it advanced with the Mumma farm buildings , already set afire by retreating Confederates on its left . The brigade moved along the axis of the Smoketown Road and reached the high ground at the Dunker Church . Greene ’ s advance stopped there . Once Maj . Gen . John Sedgwick ’ s division of the II Corps had been driven from the West Woods , Greene was forced to retreat . His two brigades rallied behind the ridge line of the Mumma farm . They reformed but did not advance again . After the battle , General Greene commended Steinrook for his conduct in the battle . After Antietam . The XII Corps was not involved in the campaign leading to the Battle of Fredericksburg . It did participate in the Mud March . In between , Stainrook was back in brigade command from December 22 , 1862 , to January 3 , 1863 . When Maj . Gen . Joseph Hooker undertook the Chancellorsville Campaign in the spring of 1863 , Stainrook ’ s regiment was in the brigade of Brig . Gen . Thomas L . Kane in the 2nd Division of the XII Corps under Brig . Gen . John W . Geary . Geary ’ s Division was heavily engaged at Chancellorsville . Stainrook commanded the brigade ’ s skirmish line on May 1 near Hazel Grove , facing southward . On May 2 , the XII Corps had to redeploy because of the flank attack launched by Stonewall Jackson on the XI Corps . By the end of the day , the division of Brig . Gen . Alpheus Williams was facing west , while Geary ’ s Division faced south , both deployed the east of Hazel Grove . On May 3 and 4 XII Corps was positioned near the Chancellorsville House , receiving heavy fire from Confederate troops . Stainrook was killed on May 4 , 1863 , “ while encouraging his men . ”