British and Commonwealth World War 1 Medical Classifications

Asessments made by medical officers as to the suitability of men to perform military duties. A system of lettering and numbering was devised to enable a man's abilities to be quickly noted.

The following are lists of categories used by the Australian and British Armies in 1914. The categories can be used in combination. I have no official reference for the Australian table.

The classifications vary between theatres of war and over time. The following is a rough guide.

[epsomandewellhistoryexplorer.org.uk/MedicalCategories.html, extracted 27 Aug 2018] and
[Butler, Official History of the Australian Army Medical Services 1914-1918, Australian War Memorial 1930]

Australian Classifications

A1

Fit for active Service

A2

Fit for active service when fully trained

A3

Fit for overseas training camp, to which transferred for hardening, prior to rejoining unit overseas

A4

Fit for active service when of military age

B1A1

Fit for light duty only - 4 weeks

B1A2

Fit for overseas training camp in three to four weeks

B1A3

Fit for overseas training camp in two to three weeks

B1A4

Fit for overseas training camp when passed dentally fit

C1

Fit for Home Service only

C2

Unfit for overseas temporarily unfit for Home Service

C3

Permanently unfit for service

British Classifications

A

Ability to march, see to shoot, hear well and stand active service conditions

A1

Fit for despatching overseas, as regards physical and mental health, and training

A2

As A1, except for training

A3

Returned Expeditionary Force men, ready except for physical condition

A4

Men under 19 who would be A1 or A2 when aged 19

B

Free from serious organic diseases, able to stand service on lines of communication in France, or in garrisons in the tropics

B1

Able to march 5 miles [8 Km], see to shoot with glasses, and hear well

B2

Able to walk 5 miles [8 Km] see and hear sufficiently for ordinary purposes

B3

Only suitable for sedentary work

C

Free from serious organic diseases, able to stand service in garrisons at home

C1

Able to march 5 miles [8 Km], see to shoot with glasses, and hear well

C2

Able to walk 5 miles [8 Km], see and hear sufficiently for ordinary purposes

C3

Only suitable for sedentary work

D

Unfit but could be fit within 6 months

D1

Regular RA, RE, infantry in Command Depot

D2

Regular RA, RE infantry in Regimental Depots

D3

Men in any depot or unit awaiting treatment