"Dracula" from their album Horror Show, especially at the beginning.
There's a smattering of very powerful moments in the "Gettysburg (1863)" trilogy ("The Devil To Pay", "Hold At All Costs" and "High-Water Mark") that may induce tears.
But the beginning of "Hold at All Costs", where Confederate Brigadier General Armistead speaks about his dear friend, Union Brigadier General Winfield Hancock may be one of the strongest. Even more powerful because it's TRUEHISTORY!
"The last time we were together, I grabbed his hand and I pledged, 'If I ever draw my sword on you, May the Good Lord strike me dead'."
Also tear-inducing, from "High-Water Mark".
(Armistead) "We're almost there my boys I've never served with finer We must push forward boys And bayonet the Yankee tyrants! To the copse of trees we charge To crush the union center And when they turn and run An open road leads us to freedom!"
(Lee) "It's over now, we are retreating I never thought that we'd be beaten All this blood is on my hands The thousands dead due to my plan I am responsible All of this is my fault I thought us invincible Is this God's will, after all? I look across this blood-soaked land All this blood is on my hands! God forgive me, please, forgive me! It's all my fault! The blood is on my hands!"
"Watching Over Me" was written by Schaffer as a tribute to his best friend, who had died tragically about a decade prior. Additionally, said friend was the one who suggested the name "Iced Earth" to Schaffer, as the band was known as "Purgatory" until 1988.