Comment by apical_dendrite

It's pretty easy to compare the backgrounds of every prior secretary of defense with Pete Hegseth. They're typically people with significant experience managing government agencies, retired 3 and 4 star generals, or senators/congressmen with serious foreign policy experience. The last person with as little defense policy experience as Hegseth was probably McNamara, and he was President of Ford, e.g. someone who knew how to manage a large organization.