In fact if a vehicle is needed troops will be able to call one in via air drop of some sort, so that could be interesting. (thatvideogameblog.com)
You'll call them in via air drop from a nearby ship. (kotaku.com)
One of the cooler aspects of the game is that you can order air drops and items or vehicles will be delivered to you as long as you're in your zone. (thatvideogameblog.com)