In what year was the team founded that won the 1956-1957 Irish League championship?
1956–57 Irish League The Irish League in season 1956–57 comprised 12 teams, and Glenavon won the championship.
Crumlin United F.C. Crumlin United Football Club is an Irish association football club based in Crumlin, Dublin. Founded in 1967, the club is one of the biggest producers of football talent in Ireland. They are linked with Nottingham Forest. Their main rival is Cherry Orchard. The club currently has teams in the Dublin District Schoolboys League and Leinster Senior League. The club is managed by Martin Loughran, who is also on the Leinster Senior League committee.