Yes: A tank can "blitz" by moving through an unoccupied hostile territory as the first part of a move THAT CAN END IN A FRIENDLY or hostile territory (emphasis mine).
One of the gotchas of doing a blitz, is that any facilities such an an Air Base, IC, or Naval Base, will block it, so if a tank enters a territory that contains any one of these things, it has to end its turn in that space.