Noticed this while playing this morning: https://imgur.com/a/kcgxDUs
It seems that either you used to be able to call in Banished/enemy vehicles at FOBs, and the content was cut, or it may be planned for a future update that you can. I hope it isn’t cut and someday we can call in Wraiths and Banshees and Choppers in FOBs and such as the game grows. I could see that being a neat feature of a Firefight mode - the ability to call down UNSC vehicles, Banished vehicles, and special vehicle variants.