The Three Sentinels by Geoffrey Household

For control of a South American oil field, two men go to war
On the spine of the Andes Mountains, three monuments have been built to honor the god known as oil. These towering derricks, known to the Company as the three sentinels, will change a few lives for the better-and destroy one thousand more. The completion of the sentinels means closing the outdated oil field known as Cabo Desierto, which hundreds of native families call home. Those who live there are to be relocated. Some are happy to move, but most are not. For the sake of their community, these radicals will fight-and they will die.

When the protests against relocation claim the life of his wife, Rafael Garay vows revenge against the Company. With his son at his side, he takes arms against the men who control the sentinels, pitting himself against a corporate troubleshooter who has never met a union he couldn't break.