Power Play (movie)

Back in the 70s there was a very interesting UK/Canada co-production called Power Play, about the planning and execution of a military coup in a fictional and un-named possibly European country (it was filmed in Yugoslavia IIRC). It was inspired by Edawrk Luttwak's "Coup D'Etat: A Practical Handbook".

Anyway, in the film the country used a vertical tricolour of blue, yellow and green. It was used very consistently throughout, with it appearing on all the military vehicles - and the designers also worked out an air force roundel (concentric green-yellow-blue) and Presidential Standard (the flag with a coat of arms on the yellow stripe).
Roy Stilling, 10 February 1996