ARMCO League was an Independent League that was based in Middletown, Oh
Middletown Blooming Mill (OH) ARMCO League 1913-1915
Middletown Clerks (OH) ARMCO League 1913-1918
Middletown Electricians (OH) ARMCO League 1913-1918
Middletown Forging (OH) ARMCO League 1916-1918
Middletown Mechanics (OH) ARMCO League 1913-1918
Middletown Sheet Mill (OH) ARMCO League 1913-1918
Middletown Shippers (OH) ARMCO League 1913-1918