The fighting around St Vith, Belgium, which involved several small units of English-speaking German infiltrators in US Army uniforms, was part of the larger Battle of the Bulge in December, 1944. It took place during one of the worst blizzards of the 20th Century in Europe which the Germans depended on to keep the Allied air forces grounded. This episode takes place in a setting with thick foliage and no snow or other winter conditions.
Saunders takes his empty rifle from Murfree and doesn't reload it before they start moving again.