Source: Per research by 160th Battalion Facebook Group. Confirmed served with 18th Battalion.
Family Search: When Terrence MacLennan was born on 3 March 1882, in Kincardine, Bruce, Ontario, Canada, his father, James McLennan, was 37 and his mother, Catherine McLeod, was 29. He registered for military service in 1916. In 1916, at the age of 34, his occupation is listed as farmer in Glammis, Bruce, Ontario, Canada. He died on 5 May 1956, at the age of 74, and was buried in Purdy Cemetery, Brockton, Bruce, Ontario, Canada.
History of the 18th Battalion CEF, "The Fighting Eighteenth" 