Camp William Penn - Credit: Wikimedia Commons
Camp William Penn was a Union Army training camp located in Cheltenham Township, Pennsylvania from 1863 to 1865 during the American Civil War. The camp was notable for being the first training ground dedicated to African American troops who enlisted in the Union Army during the Civil War. Some 11,000 free blacks and escaped slaves were trained here, including 8,612 from Pennsylvania, the most black troops recruited during the war from any northern state.Rappold, Scott, "Rare Civil War flag up for auction," York (Pa.) Sunday News, March 7, 2004. It was the largest training camp for African American soldiers. Read more on Wikipedia
Source: en.wikipedia.org