Defense Secretary Pete Hegseth fired Navy Secretary John Phelan. The Pentagon framed it Wednesday as an immediate departure.

Why it matters: The ouster of the service's top civilian caught many off-guard, and adds to the pile of military officials who either abruptly exited or were pushed out of their posts under Trump 2.0.

"Phelan didn't understand he wasn't the boss. His job is to follow orders given, not follow the orders he thinks should be given," a person familiar with the situation told Axios.

The same person said Phelan and Hegseth did not "get along."