Thank you Spike!  Much appreciated.

It's not a dumb question at all! Generally, the "Ruptured Duck" patch, a cloth discharge emblem, was primarily worn by enlisted personnel to indicate honorable discharge and authorize travel in uniform. It wasn't typically used by officers in the same manner. Sometimes, variations occur, and officers might wear them, but it wasn't standard practice. The uniforms you saw might have been exceptions or personalized choices. Hope this helps!

Its a brown dominate ARVN made shirt.

Colonel John F Kuznicki US Army Field Artillery Officer. 42nd ID staff officer during WW2, MacArthur’s HQ in Japan transportation section during the Korean War. Retired after years of serving with the Office of Research and Development that developed weapons and technology for the CIA.

I might be able to help a little, but my information is conflicting.  On the one hand, this looks like a French Model 1842 sabre bayonet.  It should be 27.4" (696mm) overall. Blade length 22.6 " (574mm).  Muzzle ring .933" (23.7mm).  If your measurements are significantly different, then it's something else.   However, the bee hive mark is by a German maker Samuel Hoppe  1827-1885.  I googled Samuel Hoppe and found that he made a French 1855 infantry sword.   Maybe something to start with. Marv Moments ago I found a photo of a French Model 1842 that has a German maker F.W.H.  which is for F.W. Holler.

Yes! Can we put a stop to AceDaily before he wrecks this site? Jeffro

Carrier Air Task Group 182

2 months out to the next show.

AceDaily, did you read the thread? This patch is not associated with the 90th BG. 

Rest assured, Patton swords were made in 1916.