The first loss of a member of the US invasion forces in Syria has finally been put into the public domain by an Israeli news outlet. This was later reported by the US press. https://www.algemeiner.com/2016/11/...first-casualty-for-us-forces-in-syria-combat/ This is the first loss your government has admitted to.
Other dead invaders seems to be mercenaries, but I'm unsure if the US government has ever admitted it uses hired killers and/or it admits to any deaths whilst they engage in paid murdering for your government. https://southfront.org/three-us-military-advisers-killed-in-syria-manbij/
I was aware of this before this newspaper article today ago so I don't think there was a grand conspiracy here.
The sailor killed was EOD with the Naval Special Warfare community out of Little Creek, Va. Before 2003 when the criteria was changed what KIA or WIA was for insurance reasons his death would have been classified as accidental.
Given their terrible track record of murder, abuse, rape and generally causing chaos in so many wars, a lot.