Cap Badge - The 40th Northumberland Regiment (Canadian Militia) 40th Northumberland Regiment. A Canadian Militia infantry regiment in Northumberland County, Ontario with headquarters at Cobourg and companies in other towns in the county, organized in 1866. The Midland Regiment originated on 5 October 1866 in Cobourg, Ontario, as the 40th Northumberland Battalion of Infantry Redesignated 8 May 1900 as the 40th Northumberland Regiment Redesignated 12 March 1920 as The Northumberland (Ontario) Regiment Redesignated 15 May 1924 as The Northumberland Regiment Amalgamated 15 December 1936 with The Durham Regiment and redesignated as The Midland Regiment (Northumberland and Durham) Redesignated 7 November 1940 as the 2nd (Reserve) Battalion, The Midland Regiment (Northumberland and Durham) Redesignated 1 June 1945 as The Midland Regiment (Northumberland and Durham) Redesignated 1 April 1946 as The Midland Regiment Amalgamated 1 September 1954 with the 9th Anti-Tank Regiment (Self Propelled), RCA, 34th Anti-Tank Battery (Self Propelled), RCA and The Hastings and Prince Edward Regiment.