So I know that this is a common forum post, and I honestly apologize for that.
However, I do not seem to be able to find any ways to get planes, sucha s jets. I used to be able to, although I am not quite sure what I did in order to unlock this. I have read that you need to upgrade things in order to get these vehicles with the use of the yellow options menu as a commander, although I can not find this ANYWHERE. Similar, I can only construct buildings at the HQ. There are no "triangles" at the airstrips, but when I used to be able to use the planes, there were no triangles there either.