

Technically, you can have 1 reservation on their system with multiple cars, so if you booked like a 15 person site, you could arrive in 4 separate cars. The receipt reflects this with a line item of “vehicles=x”. For mine, it says “vehicles=0”, so somehow it recognizes that the gibberish wasn’t a real car, but i was still required to do it.
Basically an allied country having a base in your country means that any attacker would presumably also have to attack your ally, drawimg them into the conflict. Obviously agreements like NATO article 5 can do that, but people can back out of agreements. Physical presence is more binding than paper.