The top ring was found in a dump on Fort Bliss, Texas.  I was using a metal detector in a trash dump.  There were only metal items and glass.  I believe it dates from the cavalry days.  The second ring is a United States Navy ring found in Delta, Utah.  The third ring is a nice find.  I found it in Huntsville, Alabama at Clinton Elementary School.  The school was built on the site of the former Greene Military Academy circa 1811.  Notice the old style eagle head on each side of the ring.  The bottom ring was found in Tooele, Utah at a deserted housing area.  It came out of the ground in three different pieces but it is a complete ring.  I added the coloring years later.