I was researching a military record to find out that the date of birth on the enlistment papers did not match those of real birth date.  After a bit of checking, it was discovered that the person falsified their birth date to enlist with his brothers.

Using the regiment information on the tombstone, I was able to discover more information about a brickwall problem I was having with one of the brothers.

Not all military tombstone are full stone, but just a marker with a symbol representing the war the ancestor served in.  Your Guide to Cemetery Research by Sharon DeBartolo Carmack has more information on military tombstones and markers.