In June 2003, Oracle made an unsolicited tender offer to buy PeopleSoft, a competitor in the enterprise software market. If the hostile takeover was successful, a combined Oracle-PeopleSoft would dominate certain markets. The US Department of Justice filed a civil anti-trust suit to prevent that acquisition from proceeding.
PeopleSoft is not a party in the lawsuit, but one of PeopleSoft's lawyers, Gary Reback, is sitting in on the trial and blogging daily notes
(via Ernie the Attorney)