 The Cougars hold an immense advantage in the series (71–16–3, ), but the Vandals did win back-to-back meetings in 1999 and 2000, following 14 straight Cougar victories from 1966–98.The last game played on the Idaho side of the border in this series was in 1966, a mudbath won by WSU late in the fourth quarter.This game followed consecutive Idaho victories in 1964 and 1965, which had been preceded by nine straight Cougar wins.