This song has so many genres mixed up that I can't even tell you, but the basics are cumbia, bolero, latin jazz, chacarera, regional and so much more. Then I add some distortion guitar and couple of other instruments which just fit perfectly.
The title comes from the idea that many people from south and central america have something to fight with and their lives are just really difficult. If you read about many of the social systems in the latin countries is something that really strikes you and for me everything leads to a Laments Valley (el valle de los lamentos originally in spanish)
The samples are from GPO, grooveagent, strat, and ACE.
Sorry for my english.