Produced by the Soviet Union to justify its 1939-40 Winter War campaign in Finland, this outstanding documentary---more than any other such cinematic record---visually depicts the much vaunted Mannerheim Line in all its actual emplacements, as seen but two weeks after their capture, and as filmed by Red Army combat photographers onsite, directed by Vasili Belayev.
| Directing | Valeri Solovtsov | Director |
| Camera | Vladimir Yeshurin | Director of Photography |
| Directing | Vasili Belayev | Director |
| Directing | Leonid Varlamov | Director |
| Directing | Nikolay Komarevtsev | Director |
| Camera | Yefim Uchitel | Director of Photography |
| Camera | Grigoriy Donets | Camera Operator |
| Camera | Pavel Palley | Camera Operator |
| Camera | German Shulyatin | Camera Operator |
| Camera | Semyon Shkolnikov | Camera Operator |
| Camera | Blazhkov Nikolay | Camera Operator |
| Camera | Boris Burt | Camera Operator |
| Camera | Fyodor Ovsyannikov | Camera Operator |
| Sound | Dmitriy Astradantsev | Music |
| Camera | Sergey Fomin | Camera Operator |
| Camera | Viktor Dobronitsky | Camera Operator |
| Camera | Solomon Kogan | Camera Operator |