Release Info
Release Dates
| USA | 23 July 1969 | (New York City, New York) |
| Austria | October 1969 | |
| Sweden | 11 October 1969 | |
| West Germany | 16 October 1969 | |
| France | 24 October 1969 | |
| Finland | 21 November 1969 | |
| Norway | 2 February 1970 | |
| Australia | 20 February 1970 | (Sydney) |
| Denmark | 20 March 1970 | |
| Spain | 14 January 1972 |
Also Known As (AKA)
| Das Schloß in den Ardennen | Austria, West Germany |
| A Defesa do Castelo | Brazil (imdb display title) |
| Ardenne '44: un inferno | Italy |
| Den enøjede falk | Denmark |
| Fästningen i Ardennerna | Sweden |
| Grajski stolp | Slovenia (imdb display title) |
| I megali mahi tis Flandras | Greece (transliterated ISO-LATIN-1 title) |
| La fortaleza | Spain |
| O Castelo de Maldorais | Portugal |
| Rautaiset sankarit | Finland |
| Tek gözlü kahraman | Turkey (Turkish title) |
| To kastro tou polemou | Greece (video title) |
| Un château en enfer | France |
| Vártorony | Hungary (imdb display title) |
