is saw a guy with jeeps is it in the expansion pack or what

'jeeps' are not part of the game unless you mean the Force recon transports

i saw i guy using fast attack vehicles aka jeeps they were like hummers

that narrows it down alot those are your Force recon transports or 'fast attack vehicles' the AI controls them and drives them to the target destination before they deploy infantry devisions with take cover.... usually.

sadly you dont get to control them your self they just move to your designation and defend the area