What two people met to discuss terms of surrender and to officially end the US Civil War?

Answer 1

Lee met Grant to surrender the Army of Northern Virginia - by far the biggest of the Confederate armies. There was no discussion. Grant simply imposed his own terms, and they were all that Lee could have hoped for. His men were told to hand in their weapons and sign the pledge never to take up arms against the USA. After that, they could go home.

This is often taken as the effective end of the Civil War. But there was another sizeable force in North Carolina under Joe Johnston, and this did not surrender for another two weeks. By that time, Lincoln had been assassinated, and Sherman gave Johnston terms which the new President, Andrew Johnson, considered too lenient, and the surrender had to be withdrawn and then enacted again.

Technically, there was no official end to the Civil War, as there had never been an official declaration of war. (Congress did not recognise the Confederacy as a sovereign nation.)

The Confederacy held its last cabinet meeting early in May, a few small units West of the Mississippi continued to skirmish, and a number of Confederate officers fled to Mexico rather than surrender and seek pardon.