If I recall correctly, this is how it goes;
My Grand Father - WWI - U.S. Army Infantry
My Dad - Vietnam - U.S. Air Force
An Uncle - WWII - U.S. Army Transportation Corp
An Uncle - Vietnam - U.S. Air Force, Operation Iraqi Freedom - U.S. Army Reserves. He could not decide which branch that liked.
Me - Operation Desert Shield / Storm, Operation Iraqi Freedom / Enduring Freedom - U.S. Army - Quartermaster Corp
My Daughter - Enduring Freedom - U.S. Army Reserves - Combat Camera
My Son - Whatever they are calling the current operation - Afghanistan - U.S. Army - EOD
My Son - Just starting out - U.S Air Force.