The phrase ‘(To) bury the hatchet' means to forget old enmity.
1. Both America and Russia are trying to bury the hatchet and start a new era of relationship.
2. If the two friends could bury the hatchet for ever, it would be beneficial to both of them.
3. After a prolonged battle, the two nations tried to bury the hatchet and decided to sort out the problems amiably.