Donald J. Koster, age 89, of Coopersville, passed away at home on Monday, September 14, 2015. He was preceded in death by his wife, Annette; and his brother and best friend, Herb Koster. He is survived by his son, Mike and Deb Koster; grandson, Jonathan Koster; nieces and nephews; and dear friend, Glen Haney. Don proudly served his country during WWII as a member of the U.S. Army as a tank commander. He served valiantly during the Battle of the Bulge where he was wounded, and then served as a guard at the Nuremberg Trials. Funeral services will be held on Friday 4:00 PM at Matthysse-Kuiper-DeGraaf Funeral Home (Grandville) 4145 Chicago Drive SW with Rev. Mark Bennink officiating. Military honors will be offered by the Kent County Veterans Honor Guard. Interment Rosedale Memorial Park. Relatives and friends may meet the family Friday from 3-4 PM prior to the service at the funeral home. Those who wish may make memorial contributions to Worldwide Christian Schools or Degage Ministries.