This is not a military oath guys. Please, enough of us are hurting already that we don't need these kinds of false rumors started.
This is the standard oath defined in 5 USC 3331 for all government employees
It is taken by all federal employees, and this specific wording was established in 1966. This was the swearing in of national guard units as US marshals.
Again, this is NOT a military oath, and has nothing to do with chain of command. The wording used is 100% in compliance with the code established in 1966. Every federal employee takes this exact same oath.
Again. This was an oath for US marshal. Not a military oath. The oath they read is exactly the oath mandated by 5 USC 3331.
The military oaths have nothing to do with this. This wording is standard since 1966. Please see here:
https://www.govinfo.gov/content/pkg/USCODE-2011-title5/html/USCODE-2011-title5-partIII-subpartB-chap33-subchapII-sec3331.htm