[1][2] On 1 June 1866, the 19th Battalion Volunteer Militia (Infantry) Canada was called out for active service where it served on the Niagara frontier.

[2] On 24 May 1870, the 19th Lincoln Battalion of Infantry was called out again for active service on the Niagara frontier.

[2] On 6 August 1914, the 19th Lincoln Regiment was placed on active service for local protection duties with the Welland Canal Force.

[2] When the Canadian Expeditionary Force was raised in September 1914, the 19th Lincoln Regiment as a unit wasn't mobilized for active service overseas, but the regiment did contribute drafts to help raise the 4th Battalion (Central Ontario), CEF as part of the First Canadian Contingent (later the 1st Canadian Division).

After its arrival in the UK, the battalion provided reinforcements to the Canadian Corps in the field.