Among the most enduring political images of the 20th century was the military junta. It was a group of grim-faced officers — usually three — who rose to control a state. The junta would tolerate civilian institutions that agreed to remain subservient, but in the end enforced its own will. As recently as a few decades ago, military juntas ruled important countries including Chile, Argentina, Turkey, and Greece.

These days the junta system is making a comeback in, of all places, Washington. Ultimate power to shape American foreign and security policy has fallen into the hands of three military men: General James Mattis, the secretary of defense; General John Kelly, President Trump's chief of staff; and General H.R. McMaster, the national security adviser. They do not put on their ribbons to review military parades or dispatch death squads to kill opponents, as members of old-style juntas did. Yet their emergence reflects a new stage in the erosion of our political norms and the militarization of our foreign policy. Another veil is dropping.

Given the president's ignorance of world affairs, the emergence of a military junta in Washington may seem like welcome relief. After all, its three members are mature adults with global experience — unlike Trump and some of the wacky political operatives who surrounded him when he moved into the White House. Already they have exerted a stabilizing influence. Mattis refuses to join the rush to bomb North Korea, Kelly has imposed a measure of order on the White House staff, and McMaster pointedly distanced himself from Trump's praise for white nationalists after the violence in Charlottesville.