William Roesch (plaintiff) and Helen Roesch (defendant) were married from 1947 until they were separated on December 28, 1973. During their entire marriage, William and Helen lived outside of Pittsburgh, Pennsylvania. William was employed with a steel corporation in Pennsylvania from before the start of his marriage to Helen until November 12, 1973, at which time he entered into an agreement with a new employer in Oakland, California, with a term of employment starting January 1974. William filed for divorce in July 1974 in Alameda County, California. The trial court divided as community property all the property that had been owned by William and Helen as tenants by the entireties in Pennsylvania. The trial court also divided, as quasi-community property, liquid assets, an insurance trust, and business and real-estate interests that had been titled as William’s separate property under Pennsylvania law. Helen appealed the trial court's division of the quasi-community-property interests on the ground that the division was inequitable and improper.