You are correct. I forgot you don’t feed trolls.
Just after the surrender of the Army of N Virginia, and the winding down of the war, when Lincoln was killed. He and Lee, Johnston and Sherman saved this country.
The cabinet and the whole of Washington DC were out to hang Lee and go through the south for revenge. Grant basically indicated to them that they would have to go through him to do that.
He ran the country himself for a short 24 hours after that by preventing a continuation and restart of that war.
I think the special docu about that is called 3 days to save a nation.