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                                  UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

        Date of Report (Date of earliest event reported): June 8, 2005



                               Unocal Corporation
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             (Exact name of registrant as specified in its charter)

           Delaware                  1-8483                95-3825062
     ---------------------     ------------------     --------------------      
        (State or other            (Commission        (I.R.S. Employer 
   jurisdiction of incorporation)  File Number)      Identification  No.)

          2141 Rosecrans Avenue, Suite 4000
                El Segundo, California                      90245       
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      (Address of Principal Executive Offices)            (Zip Code)

                                 (310) 726-7600                      
           ----------------------------------------------------------
              (Registrant's telephone number, including area code)   

        Former name or former address, if changed since last report: N/A

|_| Written communications pursuant to Rule 425 under the Securities Act (17 CFR
230.425)

|X| Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR
240.14a-12)

|_| Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange
Act (17 CFR 240.14d-2(b))

|_| Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange
Act (17 CFR 240.14d-2(b))



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ITEM 8.01         OTHER EVENTS

         On June 8, 2005, Chevron Corporation and Unocal Corporation ("Unocal")
jointly announced by press release that they executed agreements with the
Federal Trade Commission (FTC) staff proposing a settlement to resolve all
outstanding FTC issues associated with Chevron's proposed acquisition of Unocal.
A copy of the joint press release dated June 8, 2005 is attached hereto as
Exhibit 99.1 and is incorporated by reference into this Item 8.01.

ITEM 9.01         FINANCIAL STATEMENTS AND EXHIBITS

Exhibit No.       Description
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99.1              Joint Press Release, dated June 8, 2005







                                   SIGNATURES

         Pursuant to the requirements of the Securities Exchange Act of 1934,
the registrant has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.

                                               UNOCAL CORPORATION

                                               /s/ Terry G. Dallas
                                               ---------------------------------
                                               By:   Terry G. Dallas
                                                     Executive Vice President 
                                                     and Chief Financial Officer

Date:  June 8, 2005








                                  EXHIBIT INDEX

Exhibit No.       Description
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99.1              Joint Press Release, dated June 8, 2005