SecDef James Mattis’ resignation letter was an unusual and blunt highlighting of the tensions and flat-out disagreements he had with President Trump. Selected examples from #Fear appear in this thread. ow.ly/zV8S30n4TOy (1/10)
President Trump and Mattis at a February 8, 2017 dinner on NATO in the Red Room of the White House residence #Fear, p. 78 (2/10): 
In a 10:00 a.m. July 19, 2017 NSC meeting in the Situation Room to brief Trump on the Afghanistan and Pakistan strategy #Fear, p. 125 (3/10):
On Russia #Fear, p. 132 (4/10):
National Security Advisor H.R. McMaster on Mattis and SecState Rex Tillerson, whom he called the "team of two," on July 15, 2017 #Fear, p. 210 (5/10):
Mattis and NEC director Gary Cohn on President Trump not understanding the importance of allies, the value of diplomacy or the relationship between the military, the economy and intelligence partnerships #Fear, p. 219 (6/10):
President Trump and Mattis discussing Afghanistan in the July 20, 2017 meeting in the Tank at the Pentagon #Fear, p. 222 (7/10):
Mattis to President Trump during an August 18, 2017 NSC meeting on Afghanistan #Fear, p. 256 (8/10):
Mattis, student of The Guns of August by historian Barbara Tuchman #Fear, p. 280 (9/10):
Mattis at an NSC meeting in the Situation Room (a year into Trump's presidency, on January 19, 2018), after President Trump asked, “What do we get by maintaining a massive military presence in the Korean Peninsula?” #Fear, p. 305 (10/10):
