I thought I would just show you the flag for Lee's Dragoons. It was first carried at Guilford Courthouse and was carried until 1782. It has been mentioned that the term US was not in common usage at the time and it may be possible that the motto should read "Lee's Dragoons". However, by this stage of the war US was a fairly common term.
I have been asked to remove this image from my website but it can be viewed at the Sons of the revolution website. http://www.vssr.org/flags_4.htm
I was asked to remove it as they needed special permission to have it on their website. I have had many remarks made that this flag was unlikely to have been carried by Lee's Legion and more likely to be an 1812 flag.