The 12th Battery was a reserve artillery unit of the Canadian Army based in London, Ontario.
It entered teams in the Ontario Hockey Association's intermediate series in three seasons - 1926-27, 1927-28. and 1928-29.
In 1926-27 the 12th Battery won Group 10 and then won the ptovincial title, After that it upset the Northern Ontario Hockey Association's champion South Porcupine before succumbing to the great Toronto Varsity Grads.
In 1927-28 London 12th Battery made it as far as the quarter-final,
London 12 th Battery did not win its group in 1928-29.