On February 2, 1944, Frederick, now a full colonel, and his men landed at Anzio and went into action along the Mussolini Canal. They were the first Allied troops to enter the Italian capital of Rome on June 4, 1944. Frederick was decorated twice with the Distinguished Service Cross, the U.S. Army's second highest award for valor in combat. The first award was for actions on January 10–13, 1944 and the second award for actions on June 4, 1944. While at Anzio he was wounded a number of times, including two separate wounds on a single day.