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20th century BC by topic
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BC
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CE
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Subcategories
This category has the following 11 subcategories, out of 11 total.
D
20th-century BC disasters
(1 C)
E
Environment in the 20th century BC
(1 C)
Events in the 20th century BC
(1 C)
G
Geology in the 20th century BC
(2 C)
M
Maps showing 20th-century BC history
(4 F)
Military history in the 20th century BC
(1 C)
N
Nature in the 20th century BC
(1 C)
P
People in the 20th century BC
(12 C, 2 F)
S
Science in the 20th century BC
(1 C)
T
Transport in the 20th century BC
(3 C, 17 F)
W
20th-century BC works
(14 C, 8 F)