[cowboyway]

Seems to me there were very few Confederate leaders imprisoned after the war

Tell us a little bit about Jefferson Davis' trial, professor.

[BroJoeK]

You may remember that Democrat President Andrew Johnson, from Eastern Tennissee, pardoned all remaining Confederates when he left office in 1869.
That ended any discussion about trying Davis for treason.
Davis then became a model citizen, urging reconciliation between South & North.