What finally caused south carolina to secede from the union?
a. slavery was abolished by congress.
b. federal troops seized new orleans.
c. england threw its support to the south.
d. abraham lincoln was elected president.

The election of Lincoln as President.

While other long-term factors led to South Carolina's secession from the Union, the immediate cause was Lincoln's election to presidency.

the hyksos invasion. the hyksos were able to attack egypt successfully because of their skills in using bronze weapons, composite bows and the use of the horse and chariot during the invasion. although the egyptians depict a barbarian-type overthrow, the truth is the seizure was likely a relatively peaceful one.