Demetrio Macias is a member of a band of revolutionaries who fight to rid Mexico of the oppression of the Federales during the Mexican revolutionary war of 1910. Macias is a rancher who has a earned a reputation for bravery during the many confrontations with the Federales. At the end of the book Macias is in a desperate battle for his life of which there appears no escape. However rather than confirming Macias death the author leaves us with a vision of Demetrio Macias still fighting for his life and cause. Though it is highly probable that he does get killed, the author leaves it up to us to decide.
i took it as yes he died only because the book said "eternal glance" and when you die you are forever looking up at the sky.