The Chiefs also go as far has having "Raider Week" before each Raider game and "Red Friday".
The NFL merged in 1970 and in the teams first meeting the Chiefs held a 17-14 lead late in the fourth quarter and ready to run out the clock. Chiefs quarterback Len Dawson rolled around right end and gained enough yardage for a first down, and as he fell to the ground, he was speared from behind by Raiders Ben Davidson. A fight ensued and Davidson was shoved out of the way by Otis Taylor. The game ended in a tie, but the bitterness between the two clubs grew more intense, and the rivalry was on.
In the 1975 season, the Chiefs bet the Raiders 42-10, prompting the Chiefs' live horse mascot "Warpaint" to circle the field after each touchdown scored. After the game, Raiders coach John Madden said "We couldn"t beat the Chiefs, but we damn near killed there horse"
As of November 2008, the Chiefs lead the series 51-44-2, and with a new revamped Chiefs team, i see the "Big Red Machine" dominance over the "Silver and Black" to continue for years to come.