Wash chicken in cold water, pat dry and cut into quarters.
In a large bowl, combine garlic, oregano, salt, pepper, vinegar, olive oil, prunes, olives, capers, bay leaves and mix well. Add chicken quarters and coat well with marinade. Cover with plastic wrap and refrigerate overnight to marinate.
NEXT DAY: Preheat oven to 350 degrees F. Arrange chicken in a single layer in a 9" x 13" oven proof casserole dish or a shallow baking pan.
Spoon marinade evenly over chicken. Sprinkle chicken with brown sugar. Pour white wine into the dish, (NOT OVER THE CHICKEN).
Bake in preheated 350F oven for 50 to 60 minutes, basting frequently with pan juices. Note: Chicken is done when thigh pieces are pricked with a fork at their thickest and no pink is showing.
With a slotted spoon, transfer chicken, prunes, olives and capers to a serving platter. Moisten chicken with a few spoonfuls of pan juices. Sprinkle generously with finely chopped fresh parsley. Pour remainder of pan juices into a sauceboat and serve along with the chicken for those who desire more liquid.
NOTES: The overnight marination is essential to the moistness of the finished product. The chicken improves over a couple days of refrigeration. It also travels well and makes excellent picnic fare. Also, you may make this recipe with small drumsticks. It makes delicious hor d'oeuvres. This recipe doubles very easily if serving large groups. Bake in a large roasting pan.