These are issues #27 and #28 of War Monthly, a British historical magazine published in the mid-1970s that featured detailed articles on military history.Issue #28 (top) focuses on German tank development and invincibility, featuring technical drawings of tanks like the Panzer.Issue #27 (bottom) focuses on Allied air power, specifically U-boat conflicts in the Bay of Biscay, and included a free poster which is missing here.