The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Ranks of the British armed forces (10 members)
- Recent Transcriptions (1 member)
- References templates (7 members)
- Section templates (2 members)
- Ship templates (11 members)
- Site administration (6 members)
- Soldier's without infobox images (1 member)
- Source templates (2 members)
- South African Scottish soldiers (1 member)
- Spacing templates (5 members)
- Speeches of the Great War (2 members)
- Stub articles (264 members)
- Tables templates (2 members)
- Template (35 members)
- Template documentation pages (90 members)
- Templates (130 members)
- The Great War (14 members)
- The Great War On This Day (5 members)
- The Year 1915 Illustrated (122 members)
- The Year 1916 Illustrated (1 member)
- Timeline templates (1 member)
- Transcribing books (3 members)
- Transcribing projects (4 members)
- Trench art of the Great War (0 members)
- Trenches and fortifications (2 members)
- Trenches on the Western Front (4 members)
- Utility templates (2 members)
- War despatches (5 members)
- Weapons (1 member)
- Who's Who of the Great War (5 members)
- Winston Churchill (1 member)
- Works by Arthur Balfour (1 member)
- Works by David Lloyd George (1 member)
- Works by politicians (5 members)
- Works in the public domain (2 members)
- Works published by Constable & Co. (1 member)
- Works published by George Routledge & Sons (1 member)
- Works published by HMSO (1 member)
- Works published by Headley Brothers (2 members)
- Works published by year (9 members)
- Works published in 1914 (1 member)
- Works published in 1915 (1 member)
- Works published in 1916 (2 members)
- Works published in 1917 (1 member)
- Works published in 1918 (2 members)
- Works published in 1919 (1 member)
- Works published in 1920 (1 member)
- Works published in 1922 (1 member)
- Works published in 1925 (1 member)
- Works published in hardcover (5 members)