The 106th Pennsylvania (originally raised as the 5th California) was a volunteer infantry regiment which served in the Union Army during the American Civil War.
The regiment was recruited from Philadelphia between August and October 1861, with the exception of company K, which was transferred from the 27th Pennsylvania Infantry.
It did fight at the Battle of Antietam, where it was rushed with the rest of the 2nd Division to the aid of Joseph Hooker's corps in the West Woods.
However, division commander John Sedgwick hastened into the fight without taking time to make an adequate reconnaissance.
On July 3, 1863, the third day of fighting at Gettysburg, Companies A and B were sent as skirmishers to the Bliss Farm in front of Cemetery Ridge.