Sadly, the US Army and USMC both have white Christian nationalist doctrine installed in them which has been there since the George W. Bush administration, featuring a spiritual readiness score and mandated Evangelist sermon attendance.

Mostly, this served to just piss off the troops and deteriorate readiness and morale. A lot of these programs were discontinued under the Obama administration. I can't say what happened under Mattis in Trump 1.0 but under Hegseth there's a lot of mandated indoctrination.

And yes, it is still worsening readiness and morale.