Here's what we know about Trump's pick for Defence Secretary: Gen. James 'Mad Dog' Mattis

President-elect Donald Trump has selected retired Gen. James “Mad Dog” Mattis for the Secretary of Defence. Mattis is considered a Marine legend who has also drawn some controversy over his most colourful quotes.

Follow BI Video: On Twitter

Business Insider Emails & Alerts

Site highlights each day to your inbox.

Follow Business Insider Australia on Facebook, Twitter, LinkedIn, and Instagram.