Much as I love Star Wars and the superb score, I've just noticed how incredibly similar parts of the theme are to the score for the much earlier, classic war film, Ice Cold In Alex.
If anyone is near a freeview TV, hit Dave ja vu at 3pm and check out the opening title sequence of Ice Cold in Alex... it's on Dave now and will be repeated at 3. There's get snippets of it as incidental music but it's most obvious in the opening sequence.
Basically, it's near exactly the same as parts of the Star Wars score... namely 'the Death Star/Stormtroopers' medley.
I can't find an example of the Ice Cold in Alex soundtrack but turn on your telly and have a listen...