A team of "about a dozen" Green Berets are aiding Saudi Arabia in its fight against the Houthis in Yemen, according to a New York Times report.

Why it matters: The Pentagon has been asserting that U.S. involvement is limited to things like information sharing and aircraft refueling. But the Times reports that the Green Berets "are training Saudi ground troops to secure their border," and "helping locate and destroy caches of ballistic missiles and launch sites” that the Houthis have used to attack Saudi Arabia.

The big picture: The war in Yemen is a primary driver of the worst humanitarian crisis in the world, and the U.S. military appears to be more involved than originally explained.