Nathan Bedford Forrest the first leader of the Ku Klux Klan,
A. was a former Confederate general who killed African American soldiers at a fort in Tennessee.
B. was a former Union general who killed proslavery Confederate soldiers at a fort in Tennessee.
C. was a former Union general who came to the South for personal gain and was called a "carpetbagger."
D. was a Republican who had served in Congress and supported Radical Reconstruction policies.

I think it is C

Explanation:

Hope this was Right :D

A.  was a former Confederate general who killed African American soldiers at a fort in Tennessee.

Explanation:

Forrest is one of the most controversial figures from the Civil War era. His command was responsible for the massacre of African American Union troops stationed at Fort Pillow, Tennessee, in April 1864, and he served as the first grand wizard of the Ku Klux Klan in the early years of Reconstruction.

they killed other men

explanation:

a.that is my answer.

brainliest .