In the Invasion storyline, Shane McMahon (kayfabe) acquired World Championship Wrestling (WCW) in April 2001 and WCW personnel invaded WWF. For the first time since the Monday Night Wars, WWF's purchase of WCW had made a major American inter-promotional feud possible, but the Invasion turned out to be a disappointment to many fans. One main reason would be that many of WCW's big-name stars were still under contract to WCW's old parent company, AOL Time Warner, rather than WCW itself, and their contracts were not included in the purchase of the company. These wrestlers chose to sit out the duration of their contracts and be financially supported by AOL Time Warner rather than work for WWF for a cheaper salary.