Unless there are additional details I've missed/not been released unlikely she'd get a conviction for causing death by dangerous driving? careless driving maybe.
Though I may be wrong on that.
This is the definition of causing death by dangerous driving: "the standard of driving falls far below what would be expected of a competent and careful driver and it would be obvious to a competent and careful driver that driving in that way would be dangerous."
I seem to recall reading somewhere that it's not the first time she drove on the wrong side of the road, she's not the only one and the base was taking active steps to remind Americans driving out of the base to drive on the correct side.
I don't know if this meets the test for the offence or if she would 'get away with' causing death by careless driving - which is defined as "the standard of driving falls below what would be expected of a competent and careful driver". So the same but without the 'it would be obvious' bit.