The Undefeated (1969) - IMDb
Release Dates
| USA | 4 October 1969 | (New Orleans, Louisiana) (premiere) |
| UK | 12 October 1969 | |
| Japan | 25 October 1969 | |
| France | 31 October 1969 | |
| Ireland | 31 October 1969 | |
| West Germany | 7 November 1969 | |
| Austria | 21 November 1969 | |
| USA | 27 November 1969 | |
| Italy | 4 December 1969 | |
| Mexico | 12 December 1969 | |
| Sweden | 19 December 1969 | |
| Spain | 22 December 1969 | (Madrid) |
| Denmark | 5 January 1970 | |
| Hong Kong | 29 January 1970 | |
| Norway | 30 March 1970 | |
| Finland | 24 April 1970 | |
| Turkey | February 1971 |
Also Known As (AKA)
| Austria | Die Unbesiegten |
| Brazil | Jamais Foram Vencidos |
| Denmark | De ubesejrede |
| Spain | Los indestructibles |
| Finland | Voittamattomat |
| France | Les géants de l'Ouest |
| Greece (transliterated ISO-LATIN-1 title) | Oi aittitoi |
| Hungary | A legyőzhetetlen |
| Italy | I due invincibili |
| Mexico | Los invencibles |
| Poland | Niezwyciezeni |
| Portugal | Nunca Foram Vencidos |
| Sweden | De obesegrade |
| Turkey (Turkish title) | Batinin devleri |
| Venezuela | El dúo invencible |
| West Germany | Die Unbesiegten |
| Yugoslavia (Serbian title) (literal title) | Nepobedivi |