...as the very long official name of that religion.
TBH I'm surprised "Catholic" was part of the list of Christian faiths. There are LOTS of hardcore Protestants who don't believe Catholicism is Christian.
The funniest part is one of the faiths listed under "Christian" is Jehovah's Witnesses. It is a Christian faith, but it shouldn't be on this list because if you are a Jehovah's Witness and you join the Army they kick you out of their faith.
Hindu, Islam and Judaism all have several branches. On a different message board someone pointed out the Defense Department is actively working to recruit more Messianistic Judaism chaplains. Messianistic Judaism teaches that the Messiah has already returned to Earth and his name is Jesus Christ. In other words, it's a Christian faith designed to pull Jews into Christianity.
I suspect the real reason for this change was to de-recognize Norse faiths. Before Platoon Leader Hegseth infested the Defense Department with his venom, you could sign up as one of several Pagan faiths. Now you can't.