I have one of those badges -- the big one hanging on the wall, with the red star. It's on my denim jacket, along with (on the other side) a Russian submarine captain's badge, identical to the one Sean Connery wore in Hunt for Red October. I picked them up at a gun show in the 1990's. I passed on a gorgeous blue Kursk medal, it didn't seem right to me to possess that, as it was a sympathy offering of the Russian government to the bereft families. I did, however, have a colorful enameled command badge from a Kresta-I-class DLGM, which I unfortunately lost in a movie house.
That all said, it would be a shambles for an American formation to participate in such a giant Redfest. I suspect hidden motives and treachery here.
We marched behind the British formation. Our flagman held the Stars and Stripes straight-up vertical where all the rest have been held at an angle. I wonder if anything was meant by that.