Conversation so far:
Why is Sgt. Slaughter known as the Iraqi sympathizer?
A decision was made to have Slaughter support the Iraqi cause for the fact that Slaughter liked brutality.
Did Sgt. Slaughter wrestle with force?
Slaughter liked brutality and the Iraqi government was brutal while the US regime was said by Slaughter to have become soft and weak.
Did Sgt. Slaughter ever serve in Iraq?
Remus legitimately enlisted in the United States Marine Corps, and was a drill instructor at Parris Island, South Carolina, prior to his professional wrestling career.
Is there anything else interesting regarding Sgt. Slaughter besides Iraqi sympathizer, and brutality?
As 1990 ended, Slaughter began challenging for the WWF World Heavyweight Championship that had been held by The Ultimate Warrior since WrestleMania VI.
Did Sgt. Slaughter ever win the WWF World Heavyweight Championship?
Slaughter thus became the thirteenth WWF World Heavyweight Champion and was immediately challenged by Royal Rumble winner Hulk Hogan

Question: Why did Hulk Hogan challenge him after he won?
Self-contained rewrite: Why did Hulk Hogan challenge him after Sgt. Slaughter won the WWF World Heavyweight Championship?