Which film begins with some king of massacre on a wedding day, possibly ending up with the bride being shot, set somewhere abroad. (It could be Captain Correlli's Mandolin but I'm not sure). It was a film made either in the 1990s or 2000s and the characters concerned were not the main film characters. At present there is an ad for Guinnes which reminds me of it
Tombstone, starring Val Kilmer, and Kurt Russell. The opening scene is of a Mexican Wedding, the Cowboys, riding in, just as the couple are coming out of the church. Murder, and Rape (suggested) follows.