Idiom meaning, usage examples, facts

1. And what if the Apache dig up the hatchet and endanger the rail construction?
2. Why did Austria-Hungary dig up the hatchet to Serbia? What is the the last straw of the war?

When American Indian tribes stop fighting each other and make peace, one of the rituals in the ceremonies is that the chiefs come together and literally bury the hatchets brought from both sides. Antonym: bury the hatchet.