Community property

We were legally married in California at the end of 2004, which observes community property law, but 6 days later we moved to Illinois which does not. We resided in Chicago for two years and one month. We moved to Europe in February 2007. We separated in January 2012, after 7 years and one month of marriage. Wife now lives in California, while husband has remained in Europe. Which matrimonial regime applies, California’s or Illinois?

Husband bought property in Europe, half of the value with funds he had before the marriage and a loan, which he repaid mostly after the separation. Any thoughts on how it might be distributed by a court?