Many of the volunteer units that were raised around this time often had affiliations with expatriate groups, and names such as the Scottish Rifles, the Irish Rifles, the St. George's Rifles, and the Australian Rifles, reflected this. By 1897, there was also the 1st Australian Volunteer Horse and the Railway Volunteer Corps, and a "National Guard" of volunteer veterans. The colony also began recruiting a small number of doctors, nurses, supply troops and engineer and machine gun units were raised. By 1900, the Civil Service Volunteer Infantry Corps, the University Volunteer Rifles Corps, the Canterbury Mounted Rifles, the Drummoyne Volunteer Company, the Army Nursing Service Reserve and Army Medical Corps had also been added.