Trench warfare
(Warning: the story of Ishmal Bernal's films Relasyon (The Affair, 1982) and Broken Marriage (1983) are discussed in close detail)
Film available online (can't link to it directly though-- go look for yourself!), which is one reason why I'm reposting this. No English subtitles, alas.
You might say Ishmael Bernal's Broken Marriage (1983), his follow-up to the successful melodrama Relasyon (The Affair, 1982), isn't quite as commercially or critically successful (the film's star Vilma Santos managed to sweep all acting awards with her performance in the previous production). I suppose it's easy to see why: the earlier film looks at marriage from an unusual point of view (from the outside, or from that of the mistress); the earlier film has a relatively streamlined and somewhat titillating story (a man estranged from his wife moves in with his mistress) with a suitably dramatic finale (death by aneurysm, harrowingly shot and staged by Bernal in a single take).
Reportedly Ms. Santos, buoyed by the many acting awards earned by Relasyon, was so eager to do well in the new production that Bernal got irritated, locked her in a bathroom, and delivered to her an ultimatum: she was not coming out till she got over her 'hysteria.'