OK. Any civil war lasting more then 3 years.
A civil war is a war within a country. Lincoln’s decision to invade the Confederate States of America was not a war within one country.
The Ragamuffin War in Brazil from 1835-1845 ended with the secessionists being quite generously treated- the debts of the revolutionary government paid, military forces incorporated into the victorious military, full amnesty and even a voice in government. The English Civil War, if considered to be over with the Restoration in 1660, included a general amnesty with only 19 executions of those who executed Charles I as an exception. The Romans, after the Social War ended, conceded citizenship to the defeated in order to better unite their realm. While the latter two are debateable in their results, the first one is decidedly superior to Reconstruction.