On a side note, prior to attending flight school I was infantry, not necessarily a "dirty leg" infantryman though.
When I received a direct commission in VN, I naturally presumed Infantry Branch, right?
Well, when the GO was advancing on me with Armor branch insignia in hand ready to pin on my lapels. I said "Excuse me, Sir, but that's Armor insignia." His response was something like, "You must not have read the fine print, Armor looks at Cobras as flying tanks, and they want you!"
I NEVER fit in well as an Armor O!