If you feel comfortable, post photos of either yourself doing your years of service (if you are a veteran), or a relative.
My great grandfather (Dad's mom's father), fought in WWI. Not sure what rank he reached--little about his service is known. He died rather young, after the war.
Grandpa (Dad's dad), fought during the Korean War, 1948-1952 (I think). Rank of Private.
Grandpa (Mom's dad), fought during WWII, served 1939-1946, rank of Staff Sgt, received Bronze Star with V device, along with other medals.
My father, served 1976-77, private.