The selection of the multitalented and independent thinker Lieutenant General H. R. McMaster as national-security adviser is inspired and reifies Trump’s past statements that he likes outspoken and independent advisers. McMaster is best known for his counterinsurgency work in Iraq, but prior to that, he wrote a principled critique of Vietnam-era top brass, and he was the epitome of traditional Army conventional excellence, especially in armor, as evidenced by the victory at the Battle of 73 Easting in the first Gulf War.