Can I choose which of the branch insignias I earned to wear?

A little background on me... I enlisted in the ANG while in college as an infantryman and earnd my blue cord. I then joined ROTC and was commissioned in MI with a branch detail to Infantry (my request). I earned my blue cord again as a lieutenant, and eventually served during wartime as both an infantry LT and an MI captain. I was temporarily medically retired, but was eventually severed after improving, but not enough to return to duty.

I know that because I served during wartime I am required to wear the last rank I held (captain). My preference is to wear my infantry branch insignia as I was infantry for 6 of the 9 years I was in and my blue cord is one of my prized possessions (equal to my EIB and MSM). Should I wear my last branch insignia or can I choose?

The reason I’m asking is my (new) wife and I are planning to renew our vows next year and she has never seen me in military uniform except in pictures. I plan to surprise her with my dress blues and I want them to be without a question accurate. She volunteers with veterans regularly and I don’t want my ignorance to offend the many vets that will attend.