d-day: the first 24 hours (hb) D-Day: The First 24 Hours (HB) D-day the first 24 hours D-Day：the first 24 hours Bulge: the first 24 hours 并列题名：D-day the first 24 hours D-Day：The First 24 Hours the first 2 hours the first 20 hours 并列题名：Bulge: the first 24 hours