What is a common thread with these events?

Responses
A They all took place in the 1700s.They all took place in the 1700s.
B They all took place in the 1800s.They all took place in the 1800s.
C They were fought against an imperial power.They were fought against an imperial power.
D They all resulted in independence for the victor.

C They were fought against an imperial power.