Robert watching a pile of amputated limbs being dumped into a pit of many others outside an army hospital.
- Then his subsequent argument with his father.
Robert: I have to do this! And I will do it and I don't need your permission to enlist.
Lincoln: That same speech has been made by how many sons to how many fathers since the war began? "I don't need your damn permission, you miserable old goat, I'm gonna enlist anyhow!" And what wouldn't those numberless fathers have given to be able to say to their sons: "I'm commander-in-chief, so in point of fact, without my permission, you ain't enlisting in nothing, nowhere, young man."
- And after Robert storms off, Lincoln whispers, "We can't lose you..."