Without speaking to the topic of GP, military chaplaincy is highly common. (I want to say universal, but I can't say with 100% confidence.)

It's common in theocratic governments:

  Afghanistan
  Iran
  Mauritania
  Saudi Arabia
  Vatican City
  Yemen

and there are a number of current USofA admin supporters and personal who are Dominionists, onboard with a Christian theocracy, particularly now the war / not war / excursion is officially (by declaration of the former TV host / national guardsman in charge) a holy war supported by Jesus, Prince of Peace.

Because those in power believe that the government should run for the purpose of white evangelicals -- there's a real struggle for power here. I know that I sound hyperbolic here but I'm not: they've made it quite clear what their goals are.

Project 2025 is their playbook and that has been followed extensively so far and if they get their way the will "purge" the US of all that don't belong, i.e., anybody who's not a white evangelical.

They are literally hacking democracy, and they are black hats.