President-elect Donald Trump has appointed Ret. Gen. James "Mad Dog" Mattis to head the Department of Defense.
The revered military strategist is known for leading the 1st Marine Division's drive into Baghdad during the U.S. invasion of Iraq in 2003. He is also known for his blunt tough talk and pithy quotes.
CNBC rounded up some of the four-star general's most powerful statements on leadership and success.
Source: The New York Times