Baseball first came to Lancaster County in the 1860s by soldiers returning home from the Civil War. They learned the rules while serving in the military and wanted to continue playing. The very first professional baseball teams in Lancaster were the Lancaster Lancasters and the Lancaster Ironsides. The Lancasters played in the Keystone Association while the Ironsides played in the Eastern League, both starting in 1884. The following season, the Lancasters joined the Eastern League, and the two teams became rivals. They competed against each other for fan support, league affiliation, and money at the gate. At its peak, insults and refusals to play against each other were the norm. The teams finally agreed to play each other at the end of the 1884 season, in which the Ironsides defeated the Lancasters after seven very close games. Only the Lancasters continued play the next season.