Jim Mattis
Table:
Jim Mattis

Nickname(s)

"Chaos" (callsign)
"Warrior Monk"
"Mad Dog"

Years of service	1969–2013
Commands

U.S. Central Command
U.S. Joint Forces Command
Supreme Allied Commander Transformation
I Marine Expeditionary Force
U.S. Marine Forces Central Command
Marine Corps Combat Development Command
1st Marine Division
1st Marine Expeditionary Brigade
7th Marine Regiment
1st Battalion, 7th Marines

Battles/wars

Persian Gulf War
War in Afghanistan
Iraq War
• Invasion of Iraq
• First Battle of Fallujah
• Second Battle of Fallujah

Based on the table, determine whether the statement is entailed, neutral, or refuted. Return the result as JSON: {"answer": "YOUR ANSWER"}.

Assertion: Jim Mattis was the head of the Joint Chiefs of Staff.

answer: refuted