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Raid on the Spencer Estate was an event that occurred in 2006. After the Queen Zenobia Incident, the BSAA received a tip on the location of Oswell E. Spencer's Estate, Jill Valentine and Chris Redfield were assigned on this mission, in hope of finding info that might lead them to their former captain and nemesis, Albert Wesker. Whom they have been searching for since their last encounter with him during the Caucasus Incident. Upon entrance it appeared that Albert has already killed all of the guards and Spencer himself. The result of their fight with him caused the loss of Jill and her supposed death as both of their bodies were never found.
The BSAA had been given a tip from a reliable source on Spencer's whereabouts. Operatives Chris Redfield and Jill Valentine went to the estate that same night in hopes of arresting the fugitive company founder and gaining the whereabouts of Wesker himself.After breaking into the front door thanks to Jill's lock-picking expertise, the two had to survive through a number of deadly traps reminiscent of the Arklay estate. They also found the corpses of several of Spencer's bodyguards and reported on the discovery to HQ. Chris and Jill admitted that the castle "brought them back" to the events in Raccoon City. They arrived at Spencer's main chamber moments after Wesker and Spencer's conversation ended, guns cocked, expecting to find Spencer. Instead they found his corpse beside his empty wheelchair, and Wesker standing at the window. He turned and smiled at his two old enemies, taking their arrival at that moment and time as a sign: "The weak would always resist the will of the chosen."
A battle immediately ensued within the estate's chamber, but Chris and Jill's gunfire and hand-to-hand skills were no match for the super fast and strong Wesker. After throwing Jill aside, Wesker slammed Chris down on a large dining table, viciously dragged him along, and held him up at the window. As the villain prepared to make the killing blow, Jill came to her partner's aid and tackled Wesker out the window. The two fell along the rocky cliffside and disappeared.
The BSAA spent months searching for their bodies, to no avail, and both were presumed dead. In reality, they had survived, and Wesker saved Jill to use her for his ultimate plan. It is unknown what became of the estate. During the Kijuju Autonomous Zone Incident, Chris was hopeful that he'd still find Jill, later as Jill is spotted, it is revealed that she was in disguise all along during the incident and under the control of Albert Wesker via the P30 Device.