Need help identifying ribbon

[GMAGDNA]

www.military-quotes.com/media/military-medals-photos/p2637-unidentified-ribbon.html


I know the right side of the image is for Vietnam but I cannot ID the left side. My dad was a Lieutenant in the US Navy. Medical doctor.

Thanks in advance.

 

[MontyB]

It looks like the National Defense Service Ribbon.

https://en.wikipedia.org/wiki/National_Defense_Service_Medal

 

[GMAGDNA]

That's it. Thanks very much.

 

[crazytanker]

In the future, this website has a great amount of resources. In particular, the section on the service medals, if you're trying to identify more service ribbons.