Which group was created in late 1865 to resist reconstruction efforts in the south?

Ku klux klan

first u klux klan was formed as resistance force against martial alw and carpetbaggers it was form of undercover militia, at the end of activity of first ku klux klan it transformed into racist organization, second ku klux klan orgnised in 1915 was purely racist,  anti-catholic and anti-semite organization