The angle actually started on the 9/13/99 RAW from Anaheim, CA (13 days before the PPV). There was a 5-way #1 contender's match between Rock/Kane/Taker/Big Show/Mankind that ended in a no-contest because all 5 guys beat down the entire officiating corps. Funny moment: Earl Hebner runs out as the last official, sees the carnage, then throws up his hands and walks away. Later in the night, the refs all ask Earl what they can do to stop this violence against refs. Earl himself got hit by Steve Austin during that night's main event and called for the DQ.
The 9/16/99 SmackDown! (taped 9/14/99 in Las Vegas, NV) opened with a shot of the referees protesting outside the arena. This show (and the 9/20 and 9/23 TV shows, plus the 9/26/99 Unforgiven PPV) used the following scab referees: Sgt. Slaughter, Harvey Wippleman, Dr. Tom Prichard, and Steve Lombardi.