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It's probably out of place but, I think the ending, when the Zulu sing praise for the defenders and leave was a pretty heartwarming moment. As the translator of the group said they were "Saluting fellow braves." And after they've all left, one lingered a moment longer to give the defenders one last salute. A very deep moment in my opinion.
Thanks to the laws of at-the-time Apartheid South Africa, the production team were outraged that they wouldn't be allowed to pay the Zulu extras. To get around this, at the end of the shoot the director Cy Endfield gifted all the animals purchased for the film to them, including the large herd of cows, which were arguably much more valuable and appreciated.