Team Logo. Philadelphia Union is a team in Major League Soccer. The team names pays homage to the city's role in America's colonial period. The rattlesnake logo was designed to honor the "Join or Die" political cartoon by Benjamin Franklin. Retrieved from "https://prosportsteams.fandom.com/wiki/Philadelphia_Union?oldid=6084" Categories: Major League Soccer teams Teams in Pennsylvania Add category Cancel Save Community content is available under CC-BY-SA unless otherwise noted.