The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
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- Administration (13 members)
- Aerial Warfare (4 members)
- Age Icons (16 members)
- Ages (11 members)
- Air Defense (4 members)
- Aircraft (20 members)
- Americans (4 members)
- Ancient Age (76 members)
- Anti-Aircraft (3 members)
- Article management templates (16 members)
- Article stubs (45 members)
- Articles without pictures (23 members)
- Artillery Weapons (14 members)
- Aztecs (5 members)
- Ballistic Missiles (2 members)
- Bantu (5 members)
- Basic Resources (6 members)
- Battleships (1 member)
- BlogListingPage (0 members)
- Blog posts (28 members)
- Bombardment Ships (2 members)
- Bomber Aircraft (5 members)
- British (6 members)
- Browse (7 members)
- Building Histories (18 members)
- Building Strategies (17 members)
- Buildings (21 members)
- Campaign (15 members)
- Campaign-Only Nations (14 members)
- Campaign-Only Resources (13 members)
- Campaign-Only Units (18 members)
- Campaign Atlases (5 members)
- Campaign Buildings (3 members)
- Campaign Concepts (4 members)
- Campaign Information (10 members)
- Candidates for Deletion (2 members)
- Candidates for Moving (0 members)
- Candidates for Protection (0 members)
- Categories Requiring Attention (0 members)
- Category templates (3 members)
- Cavalry (64 members)
- Chinese (5 members)
- Civic Buildings (17 members)
- Civic Research (7 members)
- Civilians (10 members)
- Classical Age (65 members)
- Cleanup (1 member)
- Commands (1 member)
- Commerce Research (7 members)