Rest from war
describes a state of peace, quiet, and calm that follows the end of military threats or oppression. War disturbs not just people but the environment, animals, and birds.1 Since the major battles have been completed, the land as a whole would enjoy a time of quiet. The mention of the land having rest from war shows that the first section of the book of Joshua has come to an end.2
23 So Joshua took the whole land, according to all that the LORD had spoken to Moses. And Joshua gave it for an inheritance to Israel according to their tribal allotments. And the land had rest from war.