Who is Freddie Jackson

After the conversation with Jackson at his own base, Clay says he remembers Jackson's voice and he says it like Jackson is a Bad guy.
Who is this Jackson character really and what made Clay remember him, I'd like to know.

He came, saw... and got shot

You'll find out.

www.battletechmodproductions.com/
Question with boldness even the existence of a God; because, if there be one, he must more approve of the homage of reason, than that of blind-folded fear.
Thomas Jefferson, Letter, 10 Aug. 1787

Ya right, I've found it out already.
I was a bit too early in asking

He came, saw... and got shot