The Mouse That Roared movie

The best laid plans of mice and men ... A cold war satire emphasising the new emerged American Superpowers use of foreign aid to buy friends and keep then away from the USSRs influence. Peter Sellers, as the scheming Prime Minister of Grand Fenwick, plots with Peter Sellers, as the scheming Grand Duchess, to declare war on the USA, lose and get that foreign aid. Unfortunately, they forget to tell Peter Sellers, as Tully Bascombe, commander of their mediaeval army. This honourable man does his best for his country and through a series of unbelievable circumstances (well, this is a comedy) to win. Now, who has to give aid to whom?