105th Pennsylvania Infantry The 105th Pennsylvania Volunteer Infantry , also known as the " Wildcat Regiment " was an infantry regiment that served in the Union Army during the American Civil War . History . Organization and early battles . The 105th was raised mainly in the counties of Jefferson , Clarion , and Schuylkill . It was organized at Schuylkill Haven in September and October 1861 , and mustered into the U . S . service for a three - year term . Among the early recruits was future United States Congressman Albert C . Thompson . The regiment was ordered to Washington in October and assigned to the 1st Brigade , 1st Division , III Corps , in Camp Jameson ( on the farm of American Revolution patriot George Mason ) , near Alexandria . Leaving camp on March 17 , 1862 , the regiment took part in the siege of Yorktown and the battles of Williamsburg and Fair Oaks . In the latter engagement , the troops fought like veterans , holding their position unsupported until nearly surrounded . Three companies were on special duty at the opening of the action and , being unable to reach the regiment in its exposed position , fought with the 57th Pennsylvania . After a month spent on picket duty , the 105th was again in action at Glendale and Malvern Hill , and , by the time it reached Harrison ' s Landing , the ranks were so reduced by wounds and sickness that less than 100 men were fit for active duty . While posted along the railroad between Manassas and Warrenton Junction , companies B , G and H were captured by the Confederates . The 1st and Hooker ' s divisions were engaged at Bristoe Station on August 29 . The following day , the entire army was in action at Second Bull Run , where once more the gallant work of the 105th resulted in significant losses . The regiment was specially complimented by Maj . Gen . Philip Kearny for its gallantry . September and October were spent at Washington . The command left the nation ' s capital on October 28 , and , after some scouting near Leesburg , arrived at Falmouth on November 24 . The 105th ' s next battle was at Fredericksburg , after which it spent the winter in camp near Brandy Station . 1863 and 1864 battles and campaigns . At the Battle of Chancellorsville in May 1863 , the troops were warmly engaged , and many won the Kearny Medal of Honor ( the Kearny Cross ) . The first two weeks of June were spent at Banks Ford , and then the troops started northward . At the Battle of Gettysburg , the regiment lost many men , and , after the return to Virginia , engagements followed at Auburn , Kelly ' s Ford , and Locust Grove in the Mine Run campaign late in November . At the end of that campaign , the regiment returned to the camp at Brandy Station for the winter , and , on December 28 , 1863 , nearly the entire regiment re - enlisted . The regiment fought at the battles of the Wilderness and Spotsylvania in May 1864 and then moved to Petersburg with the army , where it took part in the operations of the X Corps in August and the movements upon the Wilmington and Weldon Railroad in October and December . On September 5 , the remainder of the 63rd was added to the regiment . The end of the war . On February 20 , 1865 , the 105th absorbed Company C of the 2nd United States Volunteer Sharpshooter Regiment , which as disbanded on that date , and in March 1865 , about 300 new recruits were received . At Sailor ' s Creek , the 105th was actively engaged , after which it returned to Alexandria . It participated in the Grand Review at Washington and was mustered out in that city on July 11 , 1865 . Out of a total enrollment of 2 , 040 , the regiment lost 309 men by death from wounds or disease , and 199 soldiers were reported as missing .