Oracle spent 18 months in pursuit of PeopleSoft, prevailing over the objection of the U.S. government and pressing the PeopleSoft board into firing Ellison's old charge Craig Conway.

FORBES: Magazine Article

That certanly seems to be the case with his play on Navistar, where he is already pressing to land a couple of board seats, at least.

FORBES: Why Navistar International Caught Icahn's Roving Eye