“From which he ultimately fired from,” compared to, “From which he ultimately fired>” See, Greg, you can end a sentence without a preposition. Man, I must be cranky this morning.
30 years ago I was near Concord, MA and stopped at a gift shop to ask directions. I said “where does that road go to” and he said you must be from the midwest and I said yes.
He said you people always end your sentences in a preposition.