Found 2 real interesting places for the martini- first was the WW-2 HD movie(documentary) on Netflix about the Solomans Is just before the war and there were native troops marching round the British flag with Martinis.
The second was "The man who would be king" 1978. with Michael Cain and Sean Connery. Lots of close ups and operational details.
Besides "Zulu" --anybody have a favorite?