Took that oath back in the 80's, and never gave it up.
Semper Fi!
I do solemnly swear (or affirm) that I will support and defend the Constitution of the United States against all enemies, foreign and domestic; that I will bear true faith and allegiance to the same; that I take this obligation freely, without any mental reservation or purpose of evasion; and that I will well and faithfully discharge the duties of the office on which I am about to enter: So help me God. WWG1WGA
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I thought the same thing as well, but noticed a difference in the wording, so re-affirmed according to the oath posted.
Re-read the oath posted, it's different than the one done while enlisting.
And thus, it begins.